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Cymraeg

UK4

A483 Llandeilo and Ffairfach Bypass Project

  • First published: 21 August 2026
  • Last modified: 21 August 2026
  • Version: 1

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The buyer is not using this website to administer the notice.

To record your interest or obtain additional information or documents please find instructions within the Full Notice Text. (NOTE: Contract Award Notices and Prior Information Notices do not normally require a response)

Contents

Summary

OCID:
ocds-h6vhtk-051dac
Published by:
Llywodraeth Cymru / Welsh Government
Authority ID:
AA0007
Publication date:
21 August 2026
Deadline date:
24 September 2026
Notice type:
UK4
Has documents:
No
Has SPD:
No
Has Carbon Reduction Plan:
N/A

Abstract

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.

Full notice text

Scope

Procurement reference

C113/2026/2027

Procurement 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.

Main category

Works

Delivery regions

  • UKL14 - South West Wales

Total value (estimated, excluding VAT)

80000000.00 GBP to 80000000.00GBP

Contract dates (estimated)

01 April 2027, 00:00AM to 01 December 2037, 23:59PM

Extension end date (if all the extensions are used): 12 January 2040

Contracting authority

Llywodraeth Cymru / Welsh Government

Identification register:

  • GB-PPON

Address 1: Gwasanaethau Caffael Corfforaethol / Corporate Procurement Services

Town/City: Cardiff

Postcode: CF10 3NQ

Country: United Kingdom

Website: http://gov.wales

Public Procurement Organisation Number: PQYQ-3841-BHTP

Email: CPDProcurementAdvice@gov.wales

Organisation type: Public authority - central government

Devolved regulations that apply: Wales

Procedure

Procedure type

Competitive flexible procedure

Is the total value above threshold?

Above threshold

Trade agreements

Government Procurement Agreement (GPA)

Lots

Divided into 1 lots

Lot number: 1

CPV classifications

  • 45000000 - Construction work

Delivery regions

  • UKL14 - South West Wales

Lot value (estimated)

80000000.00 GBP Excluding VAT

96000000.00 GBP Including VAT

Criteria used to select suppliers to tender for this lot

true

Sustainability

Small and medium-sized enterprises (SME)

Contract start date (estimated)

01 April 2027, 00:00AM

Contract end date (estimated)

01 December 2037, 23:59PM

Extension end date (estimated)

12 January 2040, 23:59PM

Can the contract be extended?

Yes

Description of extensions

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.

Participation

Conditions

Economic

Conditions of participation

as described in the Wales Construction Procurement Supplier Qualification Questionnaire, part of tender documentation

Conditions

Economic

Conditions of participation

s described in the Wales Construction Procurement Supplier Qualification Questionnaire, part of tender documentation

Conditions of participation

Suppliers are required to complete and submit the Wales Construction Procurement Supplier Qualification Questionnaire (WCPSQQ). The WCPSQQ consists of questions on debarment and mandatory exclusions, the Common Assessment Standard (CAS) question set along with supplementary project specific questions. The WCPSQQ is a combination of pass/fail questions and scored questions.

Award criteria

Type: quality

Name

Technical

Description

The technical questions will consist of the following, all of which are weighted as set out in the tender documents:

Q1 - Approach to delivery and organisational structure

Q2 - Proposed Team - Key Persons

Q3 - Reduction of carbon emissions

Q4 - Key Challenge 1 - Railway line and residential properties interface

Q5 - Key Challenge 2 - Works within the River Towy floodplain

Q6 - Social value and community benefits

Weighting: 70.00

Weighting type: percentageExact

Type: price

Name

Commercial

Description

The commercial scoring will contribute 30% of the Tenderer’s overall submission. Relevant subsection weightings and evaluation mechanisms and methods are explained in the tender documents.

Weighting: 30.00

Weighting type: percentageExact

Contract terms and risks

Payment terms

As set out in the tender documentation

Description of risks to contract performance

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

Submission

Expression of interest deadline

24 September 2026, 12:00PM

Enquiry deadline

17 September 2026, 12:00PM

Date of award of contract

01 March 2027, 23:59PM

Submission address and any special instructions

The procurement will follow the Competitive Flexible Procedure (CFP) in accordance with the Procurement Act 2023.The procurement process will follow a two stage process:Stage 1: Conditions of Participation stage consisting of the Common Assessment Standard (CAS) question set along with supplementary project specific questions. Up to five (5) highest scoring compliant responses with be shortlisted for Stage 2. Stage 2: Tender Stage. The shortlisted companies from the Conditions of Participation Stage (Stage 1) will be invited to the submit their tenders. This will consist of both technical and commercial submissions. https://www.delta-esourcing.com/respond/9XDC94DQAC

May tenders be submitted electronically?

Yes

Languages that may be used for submission

  • English
  • Welsh

Documents

ID

L-1

Document type

Bidding documents

Description

Bidders will need to click on the 'Register Interest' button on the Delta Portal and then login where you will be taken directly to the opportunity response where the documentation can be found. The opportunity on the Portal is being managed by Mott MacDonald.

ID

L-2

Document type

Technical specifications

Description

Bidders will need to click on the 'Register Interest' button on the Delta Portal and then login where you will be taken directly to the opportunity response where the documentation can be found. The opportunity on the Portal is being managed by Mott MacDonald.

ID

conflictOfInterest

Document type

Conflict of interest

Description

Not published

Coding

Commodity categories

ID Title Parent category
45000000 Construction work Construction and Real Estate

Delivery locations

ID Description
100 UK - All

Document family

Notice details
Publication date:
22 May 2025
Deadline date:
Notice type:
UK1
Version:
1
Authority name:
Llywodraeth Cymru / Welsh Government
Publication date:
13 October 2025
Deadline date:
10 November 2025 23:59
Notice type:
UK2
Version:
1
Authority name:
Llywodraeth Cymru / Welsh Government
Publication date:
03 August 2026
Deadline date:
Notice type:
UK2
Version:
1
Authority name:
Llywodraeth Cymru / Welsh Government
Publication date:
21 August 2026
Deadline date:
24 September 2026 12:00
Notice type:
UK4
Version:
1
Authority name:
Llywodraeth Cymru / Welsh Government

About the buyer

Main contact:
n/a
Admin contact:
n/a
Technical contact:
n/a
Other contact:
n/a

Further information

Date Details
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