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PQQ for Air Reservoir overhaul

ScotRail Trains Limited

This public procurement record has 2 releases in its history.

TenderUpdate

16 Jul 2026 at 01:00

OJEU - F14 - Corrigendum
Tender

23 Jun 2026 at 01:00

OJEU - F5 - Contract Notice (Utilities)
Summary of the contracting process

ScotRail Trains Limited is procuring air reservoir overhaul services for its Scottish rail fleet, using materials supplied by ScotRail. Air reservoirs are vessels used to contain compressed air, excluding pipe coils, ancillary fittings and compressor parts. The work is divided into two lots: overhaul for Class 153, 156 and 158 trains; and overhaul for HST Class 43 power cars and Mark III coaches. Suppliers may bid for one or both lots. The service includes examination, cleaning, repair, reassembly, painting and testing, with Lot 1 expressly required to follow WOSS 310/8 Version 4. Each tank must have a robust identification label so ScotRail can manage the asset, identify the kit and record completion and associated data. Delivery is in Scotland.

The procurement has reached tender: ScotRail invited offers through a selective negotiated procedure following a prior call for competition. This is a pre-qualification stage leading to a formal tender, with four candidates to be invited to the second stage on 21 August 2026. The amended deadline for electronic submissions is 4 August 2026 at 17:00. Lot 1 has a contract period of 1,440 days and Lot 2 has a period of 720 days; each includes an option to extend by up to a further 12 months. Bids must remain valid for 90 days, be submitted in English and may not contain variants. Suppliers can bid for a maximum of two lots.

This opportunity suits rail engineering, rolling-stock maintenance and safety-critical pressure-vessel specialists able to overhaul air reservoirs for several train classes. Suppliers will need the practical capability to dismantle, clean, examine, repair, reassemble, paint and test reservoirs in line with applicable rail safety-critical and rail standards. Lot 1 requires compliance with WOSS 310/8 Version 4, including its repair procedure and test specification for Class 153, 156, 158 and HST vehicles. Competitors should also be able to operate a reliable tank-identification and asset-tracking process, recording kit identity, overhaul completion and related data for every tank. The requirement may suit businesses with capacity to manage variable overhaul volumes and support either conventional diesel multiple units, HST vehicles or both.

How relevant is this notice?

Notice Information

Notice Title

PQQ for Air Reservoir overhaul

Notice Description

ScotRail Trains Limited (hereinafter referenced as ScotRail) are looking to tender for the provision of an Air Reservoir (various) overhaul service in accordance with rail safety critical and rail standards, and using Scotrail-provided materials. Noting the Out of Service (OSD) for HSTs, the business has revised the procurement strategy and the tender will now be separated into Lots to account for the differing contract end date required for the HSTs. - Lot 1 - for Class 153, 156 & 158 trains; and - Lot 2 - for HST Class 43 Power Car & Mark III Coach As part of the ITN process Suppliers will be able to bid for one or more Lots. An air reservoir is defined as a vessel (other than a pipe coil or ancillary fitting and part of the compressor) for containing compressed air. The group definition is based on the Reservoirs function, material and vehicle classification. ScotRail Trains Limited reserve the right to add or remove the numbers of overhauls per class of train, as the business requires.

Lot Information

Air Reservoir overhaul for Class 153, 156 & 158 trains

ScotRail Trains Limited (hereinafter referenced as ScotRail) are looking to tender for the provision of an Air Reservoir (various) overhaul service in accordance with rail safety critical and rail standards, and using Scotrail-provided materials. Noting the Out of Service (OSD) for HSTs, the business has revised the procurement strategy. The tender will now be separated into Lots to account for the differing contract end date required for the HSTs. Lot 1 - for Class 153, 156 & 158 trains; and As part of the ITN process Suppliers will be able to bid for one or more Lots. An air reservoir is defined as a vessel (other than a pipe coil or ancillary fitting and part of the compressor) for containing compressed air. The group definition is based on the Reservoirs function, material and vehicle classification. ScotRail Trains Limited reserve the right to add or remove the numbers of overhauls per class of train, as the business requires. The services must be in accordance with WOSS 310/8 Version 4: Repair Procedure - Dismantling, Cleaning, Examination and Repair, Reassembly and Pain ting, and Test Specification for train classes 153, 156, 158, & HSTs. As part of this service, SRTL requires the supplier to deliver a robust identification labelling system to asset manage each tank to identify the kit and record the overhaul completion date and associated data.. This is a pre-qualification activity in advance of a formal tender process. To participate, suppliers should access and complete the the pre Qualification Questionnaire published on our e-sourcing portal (wax Digital) at https://scotrail.wax-live.com/S2C/DisplayModules/TradeModules/Negotiations/Opportunities/ListEvents.aspxh

Renewal: Option to extend for a further 12 months

Air Reservoir overhaul for HST Class 43 Power Car & Mark III Coach

ScotRail Trains Limited (hereinafter referenced as ScotRail) are looking to tender for the provision of an Air Reservoir (various) overhaul service in accordance with rail safety critical and rail standards, and using Scotrail-provided materials. Noting the Out of Service (OSD) for HSTs, the business has revised the procurement strategy. The tender will now be separated into Lots to account for the differing contract end date required for the HSTs. Lot 2 - for HST Class 43 Power Car & Mark III Coach As part of the ITN process Suppliers will be able to bid for one or more Lots. An air reservoir is defined as a vessel (other than a pipe coil or ancillary fitting and part of the compressor) for containing compressed air. The group definition is based on the Reservoirs function, material and vehicle classification. ScotRail Trains Limited reserve the right to add or remove the numbers of overhauls per class of train, as the business requires. As part of this service, SRTL requires the supplier to deliver a robust identification labelling system to asset manage each tank to identify the kit and record the overhaul completion date and associated data.. This is a pre-qualification activity in advance of a formal tender process. To participate, suppliers should access and complete the the pre Qualification Questionnaire published on our e-sourcing portal (wax Digital) at https://scotrail.wax-live.com/S2C/DisplayModules/TradeModules/Negotiations/Opportunities/ListEvents.aspxh

Renewal: Possible extension of up to 12 months

Notice Details

Publication & Lifecycle

Open Contracting ID
ocds-r6ebe6-0000835148
Publication Source
Public Contracts Scotland
Latest Notice
https://www.publiccontractsscotland.gov.uk/search/show/search_view.aspx?ID=JUL560306
Current Stage
Tender
All Stages
Tender

Procurement Classification

Notice Type
OJEU - F14 - Corrigendum
Procurement Type
Standard
Procurement Category
Services
Procurement Method
Selective
Procurement Method Details
Negotiated procedure with prior call for competition
Tender Suitability
Not specified
Awardee Scale
Not specified

Common Procurement Vocabulary (CPV)

CPV Divisions

50 - Repair and maintenance services

71 - Architectural, construction, engineering and inspection services

CPV Codes

50220000 - Repair, maintenance and associated services related to railways and other equipment

50530000 - Repair and maintenance services of machinery

71630000 - Technical inspection and testing services

Notice Value(s)

Tender Value
Not specified
Lots Value
Not specified
Awards Value
Not specified
Contracts Value
Not specified

Notice Dates

Publication Date
16 Jul 20261 months ago
Submission Deadline
24 Jul 2026Expired
Future Notice Date
Not specified
Award Date
Not specified
Contract Period
Not specified - Not specified
Recurrence
Not specified

Notice Status

Tender Status
Active
Lots Status
Active
Awards Status
Not Specified
Contracts Status
Not Specified

Buyer & Supplier

Contracting Authority (Buyer)

Main Buyer
ScotRail Trains Limited
Contact Name
Available with D3 Tenders Premium →
Contact Email
Available with D3 Tenders Premium →
Contact Phone
Available with D3 Tenders Premium →

Buyer Location

Locality
GLASGOW
Postcode
G2 6HQ
Postcode Area
Glasgow
Country
Scotland
Major Region (ITL 1)
TLM Scotland
Basic Region (ITL 2)
TLM3 West Central Scotland
Small Region (ITL 3)
TLM32 Glasgow City
Delivery Location
TLM Scotland
Local Authority
Glasgow City
Electoral Ward
Anderston/City/Yorkhill
Westminster Constituency
Glasgow North

Further Information

Notice Documents

  • https://www.publiccontractsscotland.gov.uk/search/show/search_view.aspx?ID=JUN558524
    PQQ for Air Reservoir overhaul - ScotRail Trains Limited (hereinafter referenced as ScotRail) are looking to tender for the provision of an Air Reservoir (various) overhaul service in accordance with rail safety critical and rail standards, and using Scotrail-provided materials. Noting the Out of Service (OSD) for HSTs, the business has revised the procurement strategy and the tender will now be separated into Lots to account for the differing contract end date required for the HSTs. - Lot 1 - for Class 153, 156 & 158 trains; and - Lot 2 - for HST Class 43 Power Car & Mark III Coach As part of the ITN process Suppliers will be able to bid for one or more Lots. An air reservoir is defined as a vessel (other than a pipe coil or ancillary fitting and part of the compressor) for containing compressed air. The group definition is based on the Reservoirs function, material and vehicle classification. ScotRail Trains Limited reserve the right to add or remove the numbers of overhauls per class of train, as the business requires.

Open Contracting Data Standard (OCDS)

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