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A483 Llandeilo and Ffairfach Bypass Project

Llywodraeth Cymru / Welsh Government

This public procurement record has 4 releases in its history.

Tender

21 Aug 2026 at 12:39

UK4 - Tender Notice
Planning

03 Aug 2026 at 15:53

UK2 - Preliminary Market Engagement Notice
Planning

13 Oct 2025 at 15:00

UK2 - Preliminary Market Engagement Notice
Planning

22 May 2025 at 13:31

UK1 - Pipeline Notice
Summary of the contracting process

The Welsh Government is procuring works for the A483 Llandeilo and Ffairfach Bypass Project in the Llandeilo and Ffairfach area of Wales. The requirement covers development of the bypass design and assistance with the relevant statutory procedures, with provision for the appointed contractor to undertake the detailed design and construction works, subject to the statutory process and contractor performance. This is a major civil engineering and construction opportunity, classified under CPV 45000000. The project involves transport infrastructure and associated construction activity. The delivery location is recorded as UKL14, covering the project area around Llandeilo and Ffairfach. The opportunity is identified as suitable for small and medium-sized enterprises and voluntary, community or social enterprises, alongside larger organisations with the necessary construction capability.

The procurement has reached tender: the Welsh Government invited offers through a selective, two-stage Competitive Flexible Procedure under the Procurement Act 2023. Stage 1 is a Conditions of Participation stage using the Wales Construction Procurement Supplier Qualification Questionnaire; up to five compliant, highest-scoring suppliers proceed to Stage 2, the tender stage. Enquiries were due by 17 September 2026 at 12:00, and expressions of interest were due by 24 September 2026 at 12:00. The contract period is 1 April 2027 to 1 December 2037, with a maximum extent to 12 January 2040. The estimated value is £80,000,000 excluding VAT, or £96,000,000 including VAT. Evaluation is 70% technical and 30% commercial. Technical areas include delivery approach, team, carbon reduction, railway and residential interfaces, floodplain works, and social value.

This opportunity suits construction and civil engineering contractors able to develop and deliver major road infrastructure, manage statutory procedures, and potentially undertake detailed design and construction. Suppliers should be prepared to demonstrate an effective delivery approach and organisational structure, qualified key personnel, carbon-reduction measures, and experience managing complex interfaces, including railway lines and residential properties. Capability to plan and control works in a river floodplain is important, as is the ability to provide social value and community benefits. Stage 1 requires the Wales Construction Procurement Supplier Qualification Questionnaire, including the Common Assessment Standard question set, supplementary project-specific questions, debarment and mandatory-exclusion checks, and economic and technical evidence. Responses include pass/fail and scored elements, so bidders need suitable financial standing, professional capacity, technical resources and relevant project experience.

How relevant is this notice?

Notice Information

Notice Title

A483 Llandeilo and Ffairfach Bypass Project

Notice Description

This procurement relates to the award of a contract for the design development of the A483 Llandeilo and Ffairfach bypass project, and the provision of assistance with relevant statutory procedures. Subject to the outcome of the statutory procedures and the performance of the Contractor, the contract provides for the Contractor to be appointed to undertake detailed design and construction of the works. This Tender Notice signifies the start of the procurement exercise and uses the Competitive Flexible Procedure (CFP) under the Procurement Act 2023.

Lot Information

Lot 1

Renewal: The Welsh Government reserves the right to modify the Contracts awarded during their term in accordance with Section 74 and Schedule 8 of the Procurement Act 2023, including where changes arise through the NEC4 compensation event process or the materialisation of known risks identified in the tender documentation.

Planning Information

The engagement will consist of two parts: Firstly, an in-person event on Monday 27th October at the Parkgate Hotel Westgate St, Cardiff CF10 1DA at 10:30am. The purpose of the event is not to inform the design of the delivery and contracting models, or the WG’s procurement strategy per se; rather it is to give potential bidders an overview of the project. The event is open to potential bidders, if you wish to register your attendance, please email A483LlandeiloandFfairfach@arcadis.com To attend the event in person pre-registration is required, with a maximum number of 2 attendees per organisation. Upon registering your attendance, you will receive a copy of an invitation to complete a questionnaire to inform the design of the delivery and contracting models, and the Welsh Government’s procurement strategy. This questionnaire invites potential bidders to provide their views on a range of issues, including, procurement strategy, climate change, key commercial terms, project scope and potential barriers to bidding. If you are unable to attend the event and wish to share your views via our questionnaire please request a copy of the questionnaire via our mailbox A483LlandeiloandFfairfach@arcadis.com Potential bidders are requested to return their completed questionnaires by 12:00pm (midday) Monday 10th November 2025 to the following address: A483LlandeiloandFfairfach@arcadis.com

Notice Details

Publication & Lifecycle

Open Contracting ID
ocds-h6vhtk-051dac
Publication Source
Find A Tender Service
Latest Notice
https://www.find-tender.service.gov.uk/Notice/079893-2026
Current Stage
Tender
All Stages
Planning, Tender

Procurement Classification

Notice Type
UK4 - Tender Notice
Procurement Type
Standard
Procurement Category
Works
Procurement Method
Selective
Procurement Method Details
Competitive flexible procedure
Tender Suitability
SME, VCSE
Awardee Scale
Not specified

Common Procurement Vocabulary (CPV)

CPV Divisions

45 - Construction work

CPV Codes

45000000 - Construction work

Notice Value(s)

Tender Value
£80,000,000 £10M-£100M
Lots Value
£80,000,000 £10M-£100M
Awards Value
Not specified
Contracts Value
Not specified

Notice Dates

Publication Date
21 Aug 20264 days ago
Submission Deadline
17 Sep 20264 weeks to go
Future Notice Date
18 Aug 2026Expired
Award Date
Not specified
Contract Period
1 Apr 2027 - 1 Dec 2037 Over 5 years
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
Llywodraeth Cymru / Welsh Government
Contact Name
Available with D3 Tenders Premium →
Contact Email
Available with D3 Tenders Premium →
Contact Phone
Available with D3 Tenders Premium →

Buyer Location

Locality
CARDIFF
Postcode
CF10 3NQ
Postcode Area
Cardiff
Country
Wales
Major Region (ITL 1)
TLL Wales
Basic Region (ITL 2)
TLL5 South East Wales
Small Region (ITL 3)
TLL52 Cardiff and Vale of Glamorgan
Delivery Location
TLL14 South West Wales
Local Authority
Cardiff
Electoral Ward
Cathays
Westminster Constituency
Cardiff South and Penarth

Further Information

Notice Documents

Open Contracting Data Standard (OCDS)

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The Open Contracting Data Standard (OCDS) is a framework designed to increase transparency and access to public procurement data in the public sector. It is widely used by governments and organisations worldwide to report on procurement processes and contracts.

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