Official UK procurement notice
South Kensington Station Capacity Upgrade Design and Build
Authority: London Underground Limited (Public body)·On behalf of: Transport for London
What is being bought
Published requirement descriptionThis notice confirms London Underground Limited's (LUL) intention to award the South Kensington Station Upgrade two-stage Design and Build contract to Costain Limited as a call-off contract under TfL's Infrastructure Improvement Framework.
The proposed contract will be delivered through two (2) stages:
• Stage 1: Detailed Design (NEC3 ECC Main Option E)
• Stage 2: Construction (NEC3 ECC Main Option C)
In accordance with the framework allocation process as described in Schedule 7, the South Kensington Station Capacity Upgrade project was allocated to Costain.
The works will deliver an enlarged station with new platform, extended ticket hall, provision of step-free access from street to all platforms and improvements and modernisation to the station systems and staff welfare. The project will bring the new station infrastructure into operational use and realise the benefits of the wider South Kensington Station Upgrade investment, including increased station capacity.
LUL's initial commitment under the contract is limited to Stage 1. Progression to Stage 2 is optional and subject to completion of Stage 1, confirmation of affordability, receipt of the necessary approvals and satisfaction of the contractual conditions for progression. The price for Stage 2 has not yet been agreed and will be developed during Stage 1. The contract value stated in this notice therefore includes an estimate for the potential Stage 2 works and should not be interpreted as an agreed or committed Stage 2 price.
CPV: Construction work
The lotProcurement structure
single lot · no lot value publishedLot #1Lot 1Awarded
Procedure terms & legal framework
From the official record- Procedure method
- Award under framework
- Legal basis
- UKPGA · 2023/54 Procurement Act 2023
- Procurement category
- Works
- Notice status
- Awarded
- Procurement threshold
- Unspecified in notice
- Regulatory regime
- Utilities
- Commercial structure
- Call-off under a framework
- Competition type
- Direct award — no call for competition
- GPA / WTO covered
- Unspecified in notice
- Recurring procurement
- No (one-off requirement)
- First published
- 23 Sept 2026, 11:19 BST
- Last source update
- 23 Sept 2026, 11:19 BST
- Authority reference
WS2436778117- Latest notice
- Contract award notice (UK6)
- Classification (CPV)
- Delivery area
- Official registry OCID
ocds-h6vhtk-051b55
- Call-off under framework Infrastructure Improvement Framework
How it was run
- Submission deadline
- —
Timeline
4 published dates · Europe/London- Planning notice published21 May 2025, 15:09 BST
- Next notice expected354 days ago5 Oct 2025, 23:59 BST
- Contract starts268 days ago31 Dec 2025, 00:00 GMT
- Latest notice published1 day ago23 Sept 2026, 11:19 BST
Commercial outcome & contract awards
Published awards, contracts and bid statistics — not a forecast| Awarded to | Value | Date | Status |
|---|---|---|---|
Costain Limited19 Oct 2026 — 18 Jun 2028 · up to 18 Apr 2035Extensions: The initial commitment is for Stage 1, comprising detailed design. The contract includes an option for London Underground Limited (LUL) to instruct Stage 2, comprising construction and more…delivery, subject to satisfactory completion of Stage 1, confirmation of affordability, receipt of the necessary approvals and satisfaction of the contractual conditions for progression. LUL is not committed to proceed to Stage 2. | £85,000,000 | 17 Sept 2026 | Awarded |
Notice history
7 events · 3 releases on Find a Tender · since 21 May 2025- Contract signature expected28 Sept 2026, 23:59 BSTscheduled
- Contract award notice published23 Sept 2026, 11:19 BSTUK6
- Status changed to complete23 Sept 2026, 11:19 BST
- Procurement method changed23 Sept 2026, 11:19 BST
- Buyer details updated23 Sept 2026, 11:19 BST
- Pipeline notice published4 Jun 2025, 10:15 BSTUK1
- Pipeline notice published21 May 2025, 15:09 BSTUK1
Contracting authority & participating public bodies
2 public bodies on the noticeOther public bodies
- Transport for LondonProcuring entityPublic authority - central governmentLondon Underground Limited is a subsidiary of Transport for London. Transport for London has provided procurement services on London Underground Limited's behalf
Bidders & participating suppliers
1 commercial party on the notice- COSTAIN LIMITEDAwarded supplier
Official documents & specifications (3)
Official links; attachments are not copiedNotices published for this procedure
- Contract award notice Contract award notice on Find a Tender
- Pipeline notice Pipeline notice on Find a Tender
- Pipeline notice Pipeline notice on Find a Tender