Members of the Rail, Maritime and Transport union (RMT) are to start several 24-hour walkouts which start from 12, noon tomorrow.
There will be huge delays for commuters this week as entire lines will be suspended in protest over plans to stop the pay grade for night Tube drivers.
On Wednesday the first strike will start at noon until 11.59am that evening, the second walkout starts at 12pm on Thursday until 11.59am on Friday, then two more strikes are set to take place on 24 to 26 August.
Commuters are being warned by Transport for London (TfL) to finish their journeys by 1pm tomorrow and Thursday as it is expected there will be “severe disruption.”
TfL added, “All Tube lines would run a significantly reduced service at some times and would not run at others.”
RMT general secretary Mick Lynch said, “We believe that there is a deal to be done which recognises the work-life balance and job security of our members, and we are entering the reconvened talks this morning in a positive frame of mind, and we take it that LU management also will be up for a constructive solution to this dispute.
“RMT’s executive has been put on stand-by for any developments emerging from the talks later today.”
Richard Jones, head of network operations for London Underground, said, “The changes to how we roster our drivers to continue to provide a regular Tube service and create more flexibility for our staff have not resulted in any job losses.
“Our drivers have been vital in keeping the Tube running during the pandemic, ensuring that key workers could move around the city during the lockdowns and helping fuel London’s recovery in more recent weeks.
“This new arrangement means that all drivers have been given the opportunity for full-time work and long-term job certainty, while Londoners can continue to rely on the regularity of Tube services.
“These changes will allow us to operate both day-to-day Tube services and Night Tube more efficiently.
“It is extremely disappointing that the RMT has decided to announce strike action.
“I urge them to withdraw this action and to return to discussions with us to avoid this unnecessary disruption to Londoners going about their daily lives.”