RAIL union RMT pinned the blame yesterday for the chaos at London Bridge on a “catalogue of faults” with contractors working on the station’s £500 million redevelopment.

Passengers at the hub have been subject to dangerous overcrowding, delays and cancellations in recent weeks.

The union said its officials had identified poorly installed track and signalling layout, evidence of corners being cut on quality and Network Rail engineers left to correct contractor faults — all justified with “meaningless” computer models.

RMT general secretary Mick Cash said: “RMT warned from the off that the continuing chaos at London Bridge could be tracked back to the fragmentation and privatisation of our railways with its myriad of contractors and sub-contractors, and the drive to cut corners and rush through important works in the interest of meeting financial targets and protecting profits.

“The catalogue of faults identified by our reps is breath-taking and, alongside the abject failure to listen to our members who understand how a railway works, shows that the continuing chaos and overcrowding at London Bridge was entirely predictable.

“Even though RMT blew the whistle on this right from the off at no point since the pictures of the dangerous situation emerged have our reps and our members been asked for their views by the Department for Transport and the politicians who are posing about claiming that they are tackling the crisis.”

Network Rail and the train operators serving London Bridge said they were taking action to make the station a better environment for passengers to use over the months ahead as rebuilding work continues.