LONDON’S Tube station staff could strike over the closure of ticket offices, their union announced yesterday.

Members of the Transport Salaried Staffs Association (TSSA) voted more than two to one to take strike action, with 92 per cent endorsing action short of strike.

The union has warned that staff have been subjected to unprecedented levels of abuse at work following Tory ex-mayor Boris Johnson’s decision to close every Tube station office on the network.