The general secretary of the RMT union has claimed that station staff at London Bridge have been "threatened, spat on and assaulted with hot coffee" by passengers furious at the recent disruption to train services.
RMT general secretary Mick Cash said: "Our members at London Bridge are furious that they are taking the full force of the anger of passengers while those responsible are tucked up snug and warm in their offices.
"It is disgusting that staff charged with crowd control are being threatened, spat on and assaulted with hot coffee. We want measures put in place immediately to protect our members from this threatening and abusive behaviour.
"RMT is also angry that concerns voiced by staff who foresaw the problems at the station were ignored. There was a woeful lack of meaningful consultation and we are paying a heavy price for that now. That is a reflection of the fragmentation unleashed on our railways by privatisation.
"All it would take in the crushing we saw last week is for one person to lose their footing and the threat to life and limb is only too obvious. RMT is demanding action, not excuses and the usual pathetic buck-passing by the myriad of companies and contractors involved."