Workers on the London Underground (LU) are to be balloted for strikes in a dispute connected to the Night Tube services.
Members of the Rail, Maritime and Transport Union (RMT) are to vote in the coming weeks over the possibility of taking action
The union has accused tube bosses of neglecting an agreement on career advancement for the services of Night Tube workers.
Mick Cash, the union’s general secretary, claimed staff are frustrated because this agreement, which would have allowed them to progress to full-time positions, was being “flouted” by LU.
He insisted this was “wholly unacceptable” and had left the RMT – while available for talks – with no choice but to “declare a dispute and begin ballot preparations.”
A planned strike had been scheduled to take place earlier in the month, but was called off after Aslef reached an agreement with Tube bosses.