RMT leader Bob Crow says his union will ballot members for strike action over the closure of Tube ticket offices and loss of 750 jobs.
Last week Mayor Boris Johnson and London Underground Boss Mike Brown announced that all ticket offiaces would close with the loss of 750 jobs.
Instead of being based in ticket offices and back rooms, staff will be equipped with “the latest mobile technology” to allow them to monitor and manage stations while on the move.
The changes will result in the loss of 750 jobs, although the Mayor and LU say they’e committed to avoiding compulsory redundancies.
Speaking to LBC 97.3 radio, Mr Crow said the RMT and TSSA unions would serve notice of the ballot on London Underground on Tuesday morning.
He suggested that any strike action could be “quite significant” and last several days but expressed hope that LU would reach agreement with the unions and avoid the need for action.
The Mayor has also announced a new weekend Night Tube service on the Piccadilly, Victoria, Central and Jubilee lines and “key sections” of the Northern line from 2015.
Mr Crow said he was in favour of a 24 hour Tube service but wanted to ensure staff could get home safely. He also questioned whether the network would remain safe for passengers with fewer staff while being open longer.