M5 Bridgwater

National Highways
South West
Selective procedure
21 January 2026 to 28 February 2035

Construction of a new M5 Junction 22a featuring northbound-only slip roads to support industrial site access. The project also includes a technical assessment and potential capacity expansion works at the existing M5 Junction 23 to manage anticipated traffic growth resulting from the development.

Open the official notice

Awarded value: £123m; As published
Published: 26 January 2026
Awarded: 21 January 2026; Costain Limited
Contract length: 109 months; Ends 28 February 2035

What the contract covers

Works contract

Civil engineering and major infrastructure construction services for the development of strategic road network junctions and highway capacity improvements.

Provide a new Junction 22a on the M5 with northbound-only slip roads
Assess the requirement for any increased capacity at the existing Junction 23 on the M5 to accommodate anticipated traffic growth

Terms and requirements

Contract type: Works contract
Procedure: Selective procedure
Initial term: 109 months
Contract dates: 21 January 2026 to 28 February 2035
Certifications asked for: None stated
Suitable for SMEs: Not stated
Category: Works
CPV codes: 45200000

Services in this contract

Major road and junction schemesMain service£21.6m typicalNew M5 Junction 22a with northbound slip roads; capacity assessment of Junction 23

Lifecycle

Published
26 January 2026
Contract awardedto Costain Limited
21 January 2026
Contract starts
21 January 2026
Contract ends
28 February 2035

The buyer

National Highways

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The supplier

Costain Limited

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Main buyers

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Cite this contract

Link: https://bidskim.com/tender/101926/m5-bridgwater
Buyer reference: tender_491644/1541686
Open contracting ID: ocds-b5fd17-51f3de48-32f2-49f6-b8ac-72c99eee4799
Last checked: 5 November 2026

National Highways. M5 Bridgwater. Contract award, 26 January 2026. BidSkim, https://bidskim.com/tender/101926/m5-bridgwater (accessed 5 November 2026).