Published date: 6 October 2025

Awarded contract - This means that the contract has been awarded to a supplier.


Closing: 12 September 2025, 12pm

Contract summary

Industry

  • Environmental services - 90700000

Location of contract

SW1P 3JR

Value of contract

£81,662.75

Procurement reference

CF-0548000D8d000003VQwdEAG

Published date

6 October 2025

Closing date

12 September 2025

Closing time

12pm

Contract start date

6 October 2025

Contract end date

30 March 2026

Contract type

Service contract

Procedure type

Call-off from a framework agreement

A mini-competition or direct purchase from a pre-established framework agreement.

Contract is suitable for SMEs?

Yes

Contract is suitable for VCSEs?

No

Description

The Environment Agency is seeking to appoint a Contractor to undertake flood risk modelling and outline designs relating to Westbrook Mill weir on the River Wey (SU9666944205) and its proposed removal.


Site Background

Westbrook mill has been present for approximately 300 years, and numerous weirs and control structures have been in place maintaining a head of water for its operation. The mill and associated factory have been closed for decades and there is negligible heritage value associated with the site. The weir at Westbrook Mill consists of six 1.5m wide sluice gates in steel frames. There is a difference of
1.3m between the upstream and downstream bed levels, and a maintained upstream water level 1.6m above the weir sill of 36.3m AOD. The side walls downstream of the weir are cast concrete and there is a cast concrete central pier which extends 15m downstream under the road bridge giving access to the complex car park. An access walkway is present over the weir, and the weir is manually operated. The cast concrete 'troughs' formed by the walls and the central island also have a cast concrete bed slab set at approximately 36.2m AOD which functions as a second, shallow weir at low water level conditions.
Upstream of the weir the channel is confined between steel sheet pile walls with concrete capping beams for approximately 50m.
There are three overspill weirs upstream that feed the Hell Ditch (SU9582944564, SU9630344350, SU9655644244), which rejoins the main river approximately 3km downstream. There is also an informal breach which introduces additional flow into the Hell Ditch (roughly SU9649544320). In 2016, the Environment Agency installed a brush-furnished fish pass at the most-upstream overspill weir, allowing the Hell Ditch to function as a fish migration route bypassing Catteshall and Westbrook weirs on the main River Wey.

Award information

Awarded date

6 October 2025

Contract start date

6 October 2025

Contract end date

30 March 2026

Total value of contract

£81,662.75

This contract was awarded to 1 supplier.

WSP UK Limited

Address

WSP House, 70 Chancery Lane,, London, WC2A 1AF

Reference

None

Supplier is SME?

No

About the buyer

Contact name

Harjinder Grewal

Address

Seacole Building, 2 Marsham Street,
London
SW1P 4DF
United Kingdom

Email

procurement@defra.gov.uk