Search UK public tenders and contract notices

Official Find a Tender notices, one row per procedure. Filters use published facts only: delivery region from the notice, buyer type from the official classification, route and vehicle as published — never a Tenderline score.

Syntax: "exact phrase" cleaning OR catering software -consultancy (cleaning OR catering) AND hospital govern* admin+defence ocds-…

More filters
How
What
Who
When & money
Reset

All records

Showing 196,701–196,750 · every procedure in the catalogue, any stage.

208,763 procedures

  1. Closed Open procedure

    PURCON 923 Confocal Raman Microscope

    University of East Anglia · Education · East of England

    Raman Microscope

    • Microscopes
    Value
    Not published
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02cd3c
  2. AwardedLimited / restricted

    UKRI-1594 CLA License for Public Administration

    UK Research and Innovation · South West England

    UKRI-1594 Contract Award Notice for a CLA License for Public Administration. Contract awarded in alignment with PCR Regulation 32(2)(b)(ii).

    Awarded to THE COPYRIGHT LICENSING AGENCY LTD · 2 awards

    • Newspapers, journals, periodicals and magazines
    Value
    Not published
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02cd3a
  3. Closed Open procedureFramework

    Future Network for Schools (FN4S) Service for educational establishments in Hampshire and Southampton

    Hampshire County Council · Local authority · South East England

    Hampshire County Council (HCC) is seeking to create a single supplier framework called Future Network for Schools, that will provide a reliable, scalable, flexible and affordable managed internet access service for Schools, Academies and ot…

    • Broadband
    • For Internet
    • For computer hardware
    • +3
    Value
    £25mceiling, not a contract size
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-0293a4
  4. Closed Selective / two-stageFramework4 lots

    SPS 2298 - Provision of Adults & Children including Learning Disability, Home Care, Extra Care & Related Services Framework Agreement

    Royal Borough of Greenwich · Local authority · Nationwide (UK)

    The Royal Borough of Greenwich is seeking a range of Providers for inclusion on a closed framework agreement who can demonstrate a strong record of accomplishment in the delivery of domiciliary homecare to a wide range of people. We are see…

    • Health and social work services
    • Health services
    • Social work and related services
    Value
    £180mceiling, not a contract size
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02ad04
  5. Closed Open procedure

    Kirklees College Human Resources and Payroll Management Software

    Kirklees College · Education · Yorkshire and the Humber

    Kirklees College has a requirement to appoint a single supplier for the supply, implementation and maintenance of Human Resource Management and Payroll software.

    • IT software development services
    • Personnel and payroll services
    Value
    Not published
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02b756
  6. Closed Open procedure

    VDI Expansion

    New City College · Education · Greater London

    New City College wishes to expand its existing use of VDI across other sites with the college Group

    • Computer back-up services
    • Computer equipment and supplies
    • Computer screens and consoles
    • +3
    Value
    Not published
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02bc9b
  7. Closed Open procedureFramework

    Framework Provision of Ultra Low Emission Buses and Associated Repair and Maintenance

    Transport for Greater Manchester · North West England

    TfGM is looking to establish framework contracts for the provision of Ultra Low Emission Buses (ULEB) and the associated repair and maintenance. The purpose of this tender is to establish a framework of suppliers who will be able to provide…

    • Double-decker buses
    • Low-floor buses
    • Public-service buses
    Value
    Not published
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02bd64
  8. Closed Selective / two-stage

    LGPS Central UK Direct Property Fund Depositary

    LGPS CENTRAL LIMITED · East Midlands, West Midlands

    LGPS Central will be the AIFM of the Property ACS and wishes to appoint a Depositary to: - Provision of a Formal Property Procedure for the sale and disposal of assets the Investment Manager will be expected to follow.- Monitoring the AIF’s…

    • Financial and insurance services
    Value
    Not published
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02c30f
  9. Closed Open procedureFramework8 lots

    The Supply of Personal Protective Equipment (PPE)

    LEIDOS SUPPLY, LIMITED · Nationwide (UK)

    Team Leidos are proud to be delivering the logistics commodities and services transformation (LCS(T)) Delivery partner contracts (LCS (T)/0001 dated 16.4.2015) on behalf of the UK Ministry of Defence (the ‘Prime Contract’). Delivery of othe…

    • Gas masks
    • Gloves
    • Helmets
    • +3
    Value
    £6.2mceiling, not a contract size
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02b278
  10. Closed Open procedure

    Soft Facilities Management Services for East London NHS Foundation Trust

    East London NHS Foundation Trust · NHS & health · Nationwide (UK)

    East London NHS Foundation Trust is seeking to appoint a supplier who is able to deliver the following Soft FM Services across sixty-five (65) of its sites in and around London: Cleaning Services, Catering Services, Pest Control Services, G…

    • Catering services
    • Cleaning services
    • Facilities management services
    • +3
    Value
    £70m
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02bef3
  11. Closed Open procedure

    FNCH MRI Enabling Works

    University Hospitals of Derby and Burton NHS Foundation Trust · NHS & health · East Midlands

    Removal of plant and demolition of building elements at FNCH; replacement of certain elements.

    • Construction work
    Value
    Not published
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02c563
  12. Closed Open procedureFramework4 lots

    Provision of Enterprise, Regeneration and Tourism focused Communication and Engagement services Framework

    Newry Mourne & Down District Council · Local authority · Northern Ireland

    A multi-supplier Framework for the provision of Communication and Engagement services comprised of 4 No. Lots as per the table below: Lot No. Lot Title 1 Communications and Engagement services including: • Multi Media Campaigns, • Digital E…

    • Administrative services related to tourism affairs
    • Advertising photography services
    • Graphic design services
    • +1
    Value
    £500kceiling, not a contract size
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02b765
  13. Closed Open procedure

    How can tech help us understand how our school buildings are used, and help support asset performance, wellbeing and sustainability?

    Scottish Futures Trust Limited · Scotland

    We currently do not fully understand how the physical spaces in schools and educational buildings are utilised beyond timetabling and term-time considerations, and without full understanding, effective planning and management is not possibl…

    • Air quality management
    • Electric sensors
    • Energy meters
    • +2
    Value
    £250k
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02bb73
  14. Closed Open procedure

    Hand Dispensed Laundry Detergent

    Ministry of Justice · Central government · Nationwide (UK)

    Supply of Hand Dispensed Laundry Detergent for Her Majesty's Prison and Probation Service (HMPPS) establishments, across the United Kingdom

    • Detergents
    Value
    £2.4m
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02bbe2
  15. Closed Open procedure

    2021_Marketing - British Council - Marketing Automation Programme

    British Council · Local authority · Nationwide (UK)

    Intention to procure a Marketing Automation Platform during July/August 2021. The objective of this programme is to procure and implement a marketing automation platform that will enable us to increase our digital engagement with audiences …

    • Sales, marketing and business intelligence software development services
    Value
    £3.0m
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02bc25
  16. Closed Open procedureFramework

    The Provision of Legal Services

    APUC Ltd · Scotland

    The Authority are seeking Contractor(s) for the provision of specialist Legal Services for the further and higher education sector in Scotland. The Authority are seeking to obtain, through this tendering process, price normalisation for all…

    • Legal advisory and information services
    • Legal advisory and representation services
    • Legal advisory services
    • +3
    Value
    £3.4mceiling, not a contract size
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02c1f3
  17. Closed Open procedure

    Athol House, Ponteland

    Karbon Developments Limited · North East England

    Athol House, Ponteland

    • Building construction work
    • Construction work
    • Flats construction work
    Value
    £5.2m
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02c46a
  18. AwardedOpen procedure149 lots

    Home to School Transport by Taxi, Special Taxi, Minibus and Special Minibuses for the Education Directorate Bridgend County Borough Council

    Bridgend County Borough Council · Local authority · Wales (Cymru)

    The service to be provided under each Lot will comprise the collection at specified times (from pupil’s home addresses) and dropping off at school of pupils at a particular primary or secondary school in the county borough of Bridgend, and …

    Awarded to supplier not published · 149 awards

    • Hire of passenger transport vehicles with driver
    Value
    £10m
    Submit via
    Jaggaerlogin required
    Published
    Reference
    ocds-h6vhtk-02b7b7
  19. Closed Open procedure

    Supply and Installation of a Hydrogen Reactor for Processing of Magnetic Scrap (HPMS) Vessel, to the University of Birmingham

    University of Birmingham · Education · West Midlands

    This project is funded by the UK Research and Innovation (UKRI) Industrial Strategy Challenge Fund; Driving the Electric Revolution under grant agreement 1524086 The University of Birmingham invites tenders for supply of a bespoke, hydrogen…

    • Hydrogen, argon, rare gases, nitrogen and oxygen
    • Magnets
    • Pressure vessels
    Value
    £610k
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02b914
  20. Closed Open procedure

    Gearbox D12

    Minesto UK Ltd · Wales (Cymru)

    Gearbox for tidal power plant

    • Gears and gearing
    • Gears, gearing and driving elements
    • Plain gears, gearing and driving elements
    Value
    Not published
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02ba5f
  21. Closed Open procedure

    Tether Connectors

    Minesto UK Ltd · Wales (Cymru)

    Tether connectors and cables to for tidal power plant

    • Cable accessories
    • Cable and related products
    • Insulated cable accessories
    • +2
    Value
    Not published
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02bca4
  22. Closed Open procedure

    St Philip's School, OHCAT, Toilet Refurb Works

    Orchard Hill College & Academy Trust · Education · South East England

    OHCAT wishes to engage a contractor to undertake toilet refurbishment works at St Philip’s School in a number of locations throughout the school for staff and pupils.

    • Plumbing and sanitary works
    • Refurbishment work
    Value
    £110k
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02bde8
  23. Closed Open procedureFramework

    Framework agreement of oceanographic modelling technical support

    Minesto UK Ltd · Wales (Cymru)

    The purpose of this document is to present the Technical Requirements for the provision of a Framework Agreement of Oceanographic Modelling Technical Support consultant services for the Minesto Company (Deep Green Technology). Key services …

    • Subsurface surveying services
    Value
    £100kceiling, not a contract size
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02bf04
  24. Closed Route not published

    Grip Rating Scheme

    Health and Safety Executive · Nationwide (UK)

    HSE is seeking to appoint an experienced and competent Concessionaire to operate the HSE GRIP Rating Scheme as a service concession and to provide all aspects of test development, sales and marketing, customer support and fulfilment service…

    • Architectural, construction, engineering and inspection services
    • Research and development services and related consultancy services
    Value
    Not published
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02c276
  25. PlannedRoute not published

    Provision of energy auction procurement service

    NATIONAL GRID ELECTRICITY SYSTEM OPERATOR LIMITED · West Midlands, South East England

    National Grid Electricity System Operator (NGESO) are seeking to select a strategic partner for the development of auction solutions/services with the purpose to enhance the procurement process for our ancillary services markets. NGESO welc…

    • For the energy industry
    • Software package and information systems
    • Software supply services
    Value
    Not published
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02c2d7
  26. Closed Selective / two-stageFramework8 lots

    The Cutting Edge Framework Agreement for the appointment of Contractors relating to the development and improvement of housing stock

    The Riverside Group Limited · Nationwide (UK), North East England, North West England, Yorkshire and the Humber

    The Contractors Cutting Edge Framework will be divided into 8 lots composed of 8 different regional lots for development projects of up to ?5,500,000 and a Northern lot (Lot 8) for projects valued above ?5,000,000.

    • Building construction work
    • Construction work
    • Construction work for houses
    • +3
    Value
    £625mceiling, not a contract size
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02a2ac
  27. Closed Open procedure

    ASC0255 - Leicester Specialist Substance Misuse Service

    Leicester City Council · Local authority · East Midlands

    Leicester City Council invites Tenders from suitably qualified and experienced organisations for the provision of the Specialist Substance Misuse Service (SSMS) to be commissioned by Leicester City Council for itself and its partners the Of…

    • Health and social work services
    • Other community, social and personal services
    Value
    £34m
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02b192
  28. Closed Open procedure

    Linear servo actuators

    Minesto UK Ltd · Wales (Cymru)

    Linear servo actuators for tidal power plant.

    • Actuators
    • Electric valve actuators
    • Linear accelerators
    • +1
    Value
    Not published
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02b8c8
  29. Closed Open procedureDynamic purchasing system

    ACHA DPS - West

    Argyll Community Housing Association Limited · Housing · Scotland

    This project will include the delivery of the following measures: External Wall Insulation 196 Cavity Wall Insulation 172 Roof Replacement 69 Cedral Cladding 7 Flat Roof Replacement 67 Insulation Dormers 14 Post EPC 203

    • Construction work
    Value
    Not published
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02bb5d
  30. Closed Selective / two-stage

    Extension and Alterations at Oakwood Court, Haywards Heath, West Sussex

    Sussex Housing & Care · South East England

    Design and Construction of Proposed Alterations and Extension to an existing Care Facility including improvements to Car Parking and Landscaping

    • Building extension work
    Value
    £4.0m
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02bb88
  31. Closed Open procedure

    ACHA Social House Decarbonisation Fund

    Argyll Community Housing Association Limited · Housing · Scotland

    This project will include the delivery of the following measures: Innovation – EWI 130 Properties Underfloor Insulation – 50 Properties Mechanical Heat & Ventilation – 50 Properties Air Tightness Testing – 130 Properties Solar PV – 70 Prope…

    • Thermal insulation work
    Value
    Not published
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02bc73
  32. Closed Open procedure

    New Scots Refugee Integration Evaluation

    Scottish Government · Nationwide (UK)

    The aims of the evaluation are to: - Evaluate the New Scots strategy and approach, including whether the New Scots outcomes, objectives and actions are being met. - Assess the implementation of the AMIF-funded projects, including the extent…

    • Social research services
    Value
    £150k
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02bcb8
  33. Closed Open procedure

    Dementia Advisory Service

    Hartlepool Borough Council · Local authority · North East England

    The Council is seeking submissions from suitably skilled and experienced organisations to provide Dementia Advisory Service to people who have dementia and their supporters, family and carers.

    • Health and social work services
    • Other community, social and personal services
    Value
    Not published
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02c059
  34. Closed Open procedure

    Housing regeneration project

    Livin · North East England

    The project seeks to re-design the overall layout of the site by demolishing Livin owned void properties to allow for the construction of a new road and associated infrastructure creating new access for two of the courts. In conjunction wit…

    • Building construction work
    • Construction work
    • Construction work for houses
    • +3
    Value
    Not published
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02ac38
  35. Closed Open procedure

    ESP_2021_Cleaning Services for British Council Spain 21-25

    British Council · Local authority · delivery region not published

    Provisión de Servicios de Limpieza con suministro de materiales, consumibles, fungibles y otros servicios complementarios para los centros de British Council en España localizados en Madrid, Barcelona, Valencia, Bilbao y Palma de Mallorca.

    • Cleaning services
    Value
    Not published
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02b039
  36. Closed Open procedure

    Design, Manufacture, Supply & Installation of Modular Theatre Seating at the Roundhouse

    The Roundhouse Trust · Greater London

    The Roundhouse is one of the most exciting multidisciplinary performing arts organisations in London, holding a unique place in the capital's cultural scene. The venue's offering has a strong live music focus but also features a vibrant pro…

    • Construction-related services
    • Design consultancy services
    • Designs
    • +3
    Value
    £1.0m
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02b2a4
  37. Closed Selective / two-stageFramework

    Coastal, Flood and Infrastructure Professional Services Framework Agreement: Southern Coastal Group and SCOPAC (covering England)

    Portsmouth City Council · Local authority · North East England, North West England, Yorkshire and the Humber, East Midlands, West Midlands, East of England

    Portsmouth City Council ('the council') on behalf of the Southern Coastal Group (SCG) and SCOPAC (the Regional Coastal Group for central southern England), is inviting requests to participate, from suitably qualified consultants for inclusi…

    • Advisory and consultative engineering services
    • Architectural design services
    • Architectural, engineering and planning services
    • +3
    Value
    £50mceiling, not a contract size
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02b39a
  38. PlannedOpen procedure

    Specialised Critical Care Ambulance Transport Services for the East Midlands and West Midlands Regions

    NHS England and NHS Improvement · NHS & health · East Midlands, West Midlands

    NHS Arden and Greater East Midlands CSU (AGCSU) on behalf of NHS England and NHS Improvement - Specialised Commissioning Team (referred to as the Commissioner) is inviting suitably qualified and experienced providers to deliver the Speciali…

    • Ambulance services
    Value
    £19m
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02b457
  39. Closed Open procedure

    Wyvern House College, OHCAT, Reconfiguration Project

    Orchard Hill College & Academy Trust · Education · Greater London

    OHCAT wishes to engage a contractor to undertake an internal reconfiguration project at Wyvern House. The works encompass remodelling the first floor to create two new classrooms, two new offices, a therapy room, therapy store and COSHH cup…

    • Construction work for college buildings
    • Multi-functional buildings construction work
    Value
    £130k
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02b8c5
  40. Closed Open procedure

    United Colleges Group - Manned Security Provision

    City of Westminster College · Education · Greater London

    United Colleges Group is running a tender exercise with the specific aim of appointing an outsourced service provider for its manned security provision requirements. Manned security will be required at its main campuses for differing durati…

    • Investigation and security services
    • Security services
    Value
    Not published
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02ae3d
  41. Closed Open procedure

    Magnox Ltd - Crane Maintenance Services

    Magnox Limited · Nationwide (UK)

    Maintenance, servicing and repairs to the Magnox Ltd Fleet of cranes.

    • Repair and maintenance services of cranes
    Value
    £2.0m
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02b5a6
  42. AwardedOpen procedure

    EPNCCCH21 - Carrow House Construction Project

    EASTERN PROCUREMENT LIMITED · East of England

    Thank you for your interest in the Carrow House site refurbishment project. This opportunity offers Contractors the opportunity to work with Norwich City Council and their Consultants in order to carry out construction and refurbishment wor…

    Awarded to supplier not published

    • Architectural, construction, engineering and inspection services
    • Construction work
    • Repair and maintenance services
    Value
    £1.8m
    Submit via
    In-tendlogin required
    Published
    Reference
    ocds-h6vhtk-02aacb
  43. Closed Open procedure

    ST HELENS COLLEGE DESIGN SERVICE CONSULTANT

    St Helens College · Education · North West England

    ST HELENS COLLEGE DESIGN SERVICE CONSULTANT

    • Architectural design services
    • Design consultancy services
    • Design support services
    • +1
    Value
    Not published
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02aae3
  44. AwardedOpen procedure

    CTO91 - Void Property Security Services

    Northern Ireland Housing Executive · Northern Ireland

    The Housing Executive requires a comprehensive void property security service to ensure the continuous protection of the its void properties.

    Awarded to ORBIS PROTECT LIMITED

    • Security services
    Value
    £126k
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02abe4
  45. Closed Open procedure

    Blackpool Coastal Housing - Provision of Security Services within the Resettlement Service

    Blackpool Coastal Housing · North West England

    Security Service will be provided at 3 locations within Blackpool. The buildings provide supported accommodation for young people and emergency accommodation for homeless families, couples and singles.

    • Security services
    Value
    Not published
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02ac28
  46. AwardedOpen procedure

    IT Devices

    CORNERSTONE ACADEMY TRUST · South West England

    A total of 595 devices for use by children and staff in a trust of primary schools. Requirements for 3 separate device styles within the 595 total number.

    Awarded to TME South West Limited

    • Personal computers
    • Portable computers
    Value
    Not published
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02ac71
  47. Closed Open procedure

    Provision of Vehicles, including for Grounds Maintenance use

    Ashford Borough Council · Local authority · South East England

    Provision of vehicles including for Grounds Maintenance use

    • 4-wheel-drive vehicles
    • Motor vehicles
    • Specialist vehicles
    Value
    £400k
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02a817
  48. Closed Selective / two-stage

    New Build Residential Development - Charleston, Dundee

    Blackwood Homes and Care · Scotland

    Blackwood Homes and Care are looking to appoint a single contractor to deliver a development of 66 highly accessible new homes within the Charleston area of Dundee

    • Construction work
    • Construction work for houses
    • Houses construction work
    • +1
    Value
    Not published
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02a962
  49. AwardedOpen procedureFramework

    Provision Of Framework Agreement For Qlik Estate And Data Warehouse Support Service

    University of Glasgow · Education · Scotland

    Provision Of Framework Agreement For Qlik Estate And Data Warehouse Support Service For The Period Of Two (2) Years With The Option To Extend For 2 X 12 Months. Tender documents available from Public Contracts Scotland. Tender returns shoul…

    Awarded to Behan Services Limited

    • Systems and technical consultancy services
    Value
    Not published
    Submit via
    Public Contracts Scotlandlogin required
    Published
    Reference
    ocds-h6vhtk-02ab54
  50. Closed Open procedureFramework

    Marketing and Skills Single Supplier Framework

    West Yorkshire Combined Authority · Local authority · Yorkshire and the Humber

    The Combined Authority is seeking a single provider to deliver multiple mini projects across the Employment and Skills team around improving and content provision for all-ages career platforms and associated services.The focus over the next…

    • Business analysis consultancy services
    • Business services: law, marketing, consulting, recruitment, printing and security
    Value
    £300kceiling, not a contract size
    Submit via
    portal not identified
    Published
    Reference
    ocds-h6vhtk-02ac4c