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The COSTAIN LIMITED (H7-HEATHROW) has issued a Tender notice for the procurement of a Wp6235 -T5d Mep Subcontractor in the United Kingdom. This Tender notice was published on 03 Jun 2026 and is scheduled to close on 09 Jun 2026, with an estimated Tender value of GBP 5000000. Interested bidders can access detailed Tender information, eligibility criteria, and complete bidding documents by referencing TOT Ref No. 142525397, while the tender notice number is C4N113536520 and Registering on the platform.
Procurement Summary
Country: United Kingdom
Summary: Wp6235 -T5d Mep Subcontractor
Deadline: 09 Jun 2026
Posting Date: 03 Jun 2026
Other Information
Notice Type: Tender
TOT Ref.No.: 142525397
Document Ref. No.: C4N113536520
Competition: ICB
Financier: Self Financed
Purchaser Ownership: Public
Tender Value: GBP 5000000
CPV Classification
71320000 - Engineering design servicesPurchaser's Detail
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Expression of Interest T5D MEP Subcontractor
T5D Attenuator Overhaul (Survey / RIBA 4iii) Scope
The T5D Rail-tunnel Ventilation Shaft is located adjacent to T5D at its North and can be accessed from the bottom (Level 6) via the trackside of the HEX tunnel or from the top (level 7) via Airside.
The objective is to replace the four attenuators in the T5D Shaft because they are at their end of life. The renewal of the T5D attenuators aims to reduce the risk of debris entering fans, tunnels and station, prevent the fans from failing in any fire scenario and provide ventilation and smoke clearance for the Heathrow Rail Tunnels. This improves safety conditions in Heathrow Rail Tunnels and improves resilience of systems. In addition, less maintenance and repair are required for the attenuator.
Each attenuator is formed of four quadrants weighing around 1160 kg.
Review MEP systems along the airflow and advise replacement/modification to bring them up to compliance.
Surveys will be carried out by MEP Subcontractor under the direction of the Design Consultant (Employed by the Client).
Item Question
Q1 What capability do you have of understanding the requirements for replacing attenuators etc., considering the constraints of an operational rail network?
Q2 What capability do you have of carrying out a survey of the T5D Shaft during non-operational hours to provide all the information required to complete the RIBA 4ii design by the Desi...
Location Of Contract : London
Industry : Engineering design services - 71320000
Value Of Contract : £2, 500, 000 to £5, 000, 000
Published Date : 2 June 2026
Closing Date : 9 June 2026
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