TenderlineUK
Procurement Intelligence
Official OCDS
Find a Tender
planned
Official procurement procedure

ISS Works at Walham and Pentir

Burglar-alarm system installation work
Closed-circuit surveillance system
Design consultancy services
+10 more
UK
Published value
Not published
Submission deadline 7 Oct 2026, 17:00 BST
Lots published2
Procurement Executive Summary
AI & Search Synopsis
Generated from official OCDS record
Tenderline Synopsis: NATIONAL GRID ELECTRICITY TRANSMISSION PLC: "ISS Works at Walham and Pentir". Published status: planned. Published value: Value not published. 2 published lots. Recorded submission deadline: 7 Oct 2026, 17:00 BST. See the official notice for participation instructions.
Contracting AuthorityNATIONAL GRID ELECTRICITY TRANSMISSION PLCScope & CategoriesNot publishedSubmission Window
30d 6h left
7 Oct 2026, 17:00 BST
Submission GatewayDirect notice routeLegal Basis & RegimeStandard procurementEstimated Value (exc. VAT)Not published
Bidder Intelligence · Authority Profile: NATIONAL GRID ELECTRICITY TRANSMISSION PLC
Market Analytics
View Authority Profile →
Derived from OCDS awards & bid statistics
Published history for NATIONAL GRID ELECTRICITY TRANSMISSION PLC. These figures describe retained records, not a forecast of bids or a measure of buyer bias.
Published-to-award variance
Not availableInsufficient comparable data
Requires at least 5 comparable procedures
Competition Density
6.5Bids / Report
0% of reports have one bid
Supplier ConcentrationModerate Concentration
SEESAI LIMITEDTop vendor: 42.7% of attributable value
Payment Terms
Check noticePublished terms
Payment obligations depend on the applicable regime and contract. Consult the official documents.
Coverage: 14 active published awards; 2 bid reports (which may be per lot). Supplier values exclude multi-supplier awards, frameworks and DPS, and use GBP only. They are published award values, not payments. Published-to-award variance compares single-lot, single-award, single-supplier GBP procedures with explicitly non-framework/non-DPS status; increases remain in the average. Unpublished data stays unknown. Awarded suppliers are winners, not all bidders.
Historical Awarded Suppliers With This Authority:
Supplier NameHistoric AwardsAttributable GBP Value
SEESAI LIMITED1 win£22,950,000
BAM NUTTALL LIMITED2 wins£10,200,000
COSTAIN LIMITED1 win£9,500,000
OCU UTILITY SERVICES LIMITED1 win£6,000,000
Winshall Limited1 win£5,127,099
Procedure terms
Contracting AuthorityNATIONAL GRID ELECTRICITY TRANSMISSION PLC
Procedure methodNot published
Procurement categoryNot published
Statusplanned
Framework / DPSNot published
CompetitionNot published
Above thresholdNot published
Legal basisNot published
Tender period startsNot published
Clarification deadlineNot published
Electronic submissionNot published
Submission languagesNot published
Published17 Aug 2026, 16:19 BST
Last source update17 Aug 2026, 16:19 BST
Recurring procurementNot published
ClassificationBurglar-alarm system installation work, Closed-circuit surveillance system, Design consultancy services, Design support services, Engineering works and construction works, Fences, Fencing, railing and safety equipment installation work, Fire-alarm system installation work, Gates, Installation of telecommunications equipment, Substation construction work, Surveillance and security systems and devices
Delivery area
UK
OCIDocds-h6vhtk-06e5ea
What is being bought
National Grid Electricity Transmission Plc is seeking an experienced and suitably qualified suppliers capable of delivering a fully integrated security solution for critical national infrastructure sites at Walham and Pentir.
What changed
From the official release history
  1. Status changed to planned
    17 Aug 2026, 16:19 BST
  2. Official notice release published
    17 Aug 2026, 16:19 BST
  3. Buyer information updated
    17 Aug 2026, 16:19 BST
Lots and requirements (2)
Published by the contracting authority
  • Lot 1 · #1
    ISS Walham, Gloucestershire
    planned
    Published valueNot published
    National Grid Electricity Transmission Plc is seeking an experienced and suitably qualified supplier capable of delivering a fully integrated security solution for a critical national infrastructure site at Walham.
    Contract periodNot published
    EligibilityNot published
    Options / renewalNot published
  • Lot 2 · #2
    ISS Pentir, Gwynedd
    planned
    Published valueNot published
    National Grid Electricity Transmission Plc is seeking an experienced and suitably qualified supplier capable of delivering a fully integrated security solution for a critical national infrastructure site at Pentir.
    Contract periodNot published
    EligibilityNot published
    Options / renewalNot published
Timeline
  1. Pipeline notice
    17 Aug 2026, 16:19 BST
  2. Procedure published
    17 Aug 2026, 16:19 BST
  3. Submission deadline
    7 Oct 2026, 17:00 BST
Commercial outcome and competition
AwardsNo award published
ContractsNo contract published
Bid statisticsNo aggregate bid statistics published
Buyer and organisations in this procedure

NATIONAL GRID ELECTRICITY TRANSMISSION PLC

Contracting authority GB-COH-02366977
View buyer profile

  • NATIONAL GRID ELECTRICITY TRANSMISSION PLC
    buyer

    GB-COH: 02366977 · GB-PPON: PHHJ-6513-BWZT
    1 - 3 Strand, London, UKI32, WC2N 5EH, GB
    Alana.Walburn@nationalgrid.com
Documents (2)
Official links; attachments are not copied
Related procedures (0)
No data
No related procedures published
Planning and rationale
Planning budgetNot published
No-engagement rationaleNot published
Procedure rationaleNot published