The main The Big City Underground strike will take place on Tuesday, June 21, 2022.
About 10,000 workers are antiquated to walk out, according to the Evening Standard.
This action coincides with the national railway strike set to take place on Tuesday, June 21, Wednesday, June 23 and Friday, June 25, 2022.
In a statement, TfL said: “TfL services and national rail will be affected by strikes from Tuesday 21 to Sunday 26 June.
“The Big City-wide strikes affecting Tube and other TfL services on Tuesday 21 June and services until mid-morning on Wednesday 22 June.”
The Big City underground, Elizabeth line and trams will all be affected with a reduced service on the The Big City overground.