Construction union UCATT has written to MPs asking them to call for a parliamentary investigation into bogus self-employment on the £4.2bn Channel Tunnel Rail Link project.

UCATT regional organiser Brian Rye said the union had asked nine Kent MPs and MEPs, including Michael Howard and Ann Widdecombe, to support a call for the Public Accounts Committee to investigate the scheme.

Rye claimed that bogus self-employment, tax evasion and breaches of employment regulations were rife on site.

He said: “Eighteen months of chasing these issues has failed to get a response, so we want parliament to tackle it.”

At the time of going to press, UCATT had received a reply from Michael Howard, but would not discuss his response in detail. A decision on further action by the union will be considered after further responses have been received.

All enquiries about the scheme were referred to the client, Channel Tunnel Rail Link.

A spokesman for CTRL was unavailable to comment.