M&J Group Files
Bid-rigging: Open
UPDATED

Right of Reply

Factual corrections, documentary evidence and substantive responses from all parties.

Last verified: 5 October 2026

M&J Group Files welcomes factual corrections, documentary evidence and substantive responses from M&J Group (Construction & Roofing) Ltd, its directors and employees, the Competition and Markets Authority, contracting authorities and others discussed in our reporting.

Responses are appended to relevant articles where appropriate.

M&J Group Files

Independent Investigative Publication

An independent investigation into M&J Group, CMA enforcement, public procurement and the roofing bid-rigging inquiry. Not affiliated with M & J Group (Construction & Roofing) Ltd.

M&J Group Files is an independent investigative publication and is not affiliated with M & J Group (Construction & Roofing) Ltd. The publication reports regulatory decisions, public procurement records, Companies House filings, official documents and attributable reporting. The CMA's administrative penalties relating to investigatory compliance are distinct from the separate ongoing investigation into suspected bid-rigging. No final finding that M&J Group infringed competition law through bid-rigging should be inferred unless and until such a finding is made by a competent authority.

Last verified: 5 October 2026 · Company no. 01371473 · Registered: 31 May 1978

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