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Common Assessment Standard

Joint Venture(JV) partners working on HS2 projects will require their suppliers tomprequalify by achieving the Common Assessment Standard (CAS).

This Railway Systems Scope Document ‘Compendium Version’ describes the technical coverage, or scope, of each of the proposed Tier 1 design and build railway systems contracts.


Document history

Published:
30 September 2025
Updated:
30 September 2025