London Underground staff will hold a series of strikes in a row over Night Tube drivers, it has been announced.

Members of the Rail, Maritime and Transport workers union (RMT) will walk out for 24 hours from midday on four days in August.

The union said Tube bosses planned to abolish the grade of Night Tube driver, which would threaten the loss of 200 jobs and affect other staff.

Transport for London (TfL) said the move would not cut jobs.

The four strikes are due to take place for 24 hours from 12pm on 3, 5, 24 and 26 August.

The RMT said the "cash-led move" to abolish the driver grades was "aimed at shunting staff around the combine at will".

General secretary Mick Lynch said the proposals "rip up an agreement that protects 3,000 Tube drivers' work-life balance" and were "a blatant attempt to now use the pandemic to start bulldozing through a savage programme of cuts".

Nick Dent, director of customer operations for London Underground, said the "changes to how we roster our drivers" would help "continue to provide a regular Tube service and create more flexibility for our staff".

He added that the move "will not result in any job losses" while giving part-time drivers "the opportunity for full-time work and long-term job certainty".

Further talks about the changes are due to take place this week, according to TfL.