A Labour MP has called on ministers to ban contractors involved in the construction blacklisting scandal from tendering for public contracts.

Michael Clapham recommended that contributors to the Consulting Association’s blacklist, which collected data on employees including union activity, should not be considered for public contracts.

Clapham has secured an adjournment debate on 23 March to discuss the potential ban.

Harriet Harman, leader of the Commons, said last week: “No trade union health and safety representative should find that, as a result of speaking up on behalf of their colleagues, they are on a blacklist and are never able to work again. The Government is totally opposed to that, and wants to make sure that there is most effective enforcement when that happens.”

The Information Commissioner’s Office is currently taking phone calls from employees who believe they are on the blacklist.