BUMBLING Boris Johnson yesterday capitulated to pressure and agreed to meet a worker sacked from the mayor’s Crossrail pet project for raising safety concerns.

Workers protesting against the sacking of electrician Dan Collins have repeatedly blocked central London thoroughfares and caused severe disruption at rush hour.

Mr Collins confronted the mayor on his way into the offices of LBC Radio, and said “Do you know that agency construction workers are being blacklisted with no employment rights on Crossrail?

“Taxpayers’ money is going to companies that avoid safety and are blacklisting workers for raising health and safety issues.”

Mr Johnson pleaded ignorance of the debacle, which has struck a raw nerve in the light of recent revelations of the blacklisting of thousands of construction workers by bosses in collaboration with police officers.

“I’m not aware but will be happy to speak with you about it,” Mr Johnson told the victimised worker, before his PA took down contact details and agreed to arrange a meeting.

Mr Collins complained about the absence of a handrail on a building site walkway two days after he had been told he could look forward to three years of employment on the Crossrail project.

But 48 hours after complaining he was told by managers from the Costain/Skanska joint venture contractor that they “did not want any unions or politics on the site,” according to the Blacklist Support Group. He was promptly escorted off the site by security.

Both Costain and Skanska are named in the Consulting Association blacklist database seized by the Information Commissioner in 2009.