The strike coincides with the first week of summer vacation for London schools.
Glynn Barton, TfL’s chief operating officer, said: “We are disappointed that RMT has announced a strike on this range of issues that we have been trying to discuss with them in an open and cooperative way. We urge the union to reconsider and engage with us to discuss the issues and find a solution.
“There are no current proposals to change the pension arrangements and although we are discussing with union colleagues a number of proposals to improve the way the London Underground operates, no employee will lose their job or be asked to work extra hours.”
He added: “We are trying to create a fairer and more efficient London Underground that works for our staff and for London.
“All stations would remain well-staffed at all times and we believe our proposals would provide even better and more reliable service to our customers both in terms of our stations and our train services.”
Overtime ban to add to the chaos
The last week of July promises to be full of travel chaos. RMT rail workers are planning strikes on July 22, while the ban on overtime by Aslef, the train drivers’ union, will also be extended until the weekend.
The strikes will affect all 15 rail operating companies and cause delays and some reduced services. The RMT also plans to attack on July 29.
This is the latest action by subway workers after strikes in March wreaked havoc for millions of commuters as the action shut down all subway lines and people had to find alternative ways to travel.
Strikes last November also caused widespread disruption throughout the capital.