METROPOLITAN POLICE apologies over unethical undercovers sleeping with activists were welcomed by Unite yesterday — but the construction union said top cops should come clean over alleged links to mass industry blacklisting.

Unite assistant general secretary Gail Cartmail said: “At long last, we are arriving at the truth regarding the disturbing scale of these covert activities and an acceptance that there was an organised and appalling misuse of police officers to spy on UK citizens.

“We have long been concerned that this misuse of the police extended to the workplace, where ‘rogue’ employers developed a blacklist of construction workers and others who were union members.