More details about who is striking on which days of this strike:
In a separate dispute over pay and conditions, workers on the Docklands Light Railway will also be striking during this period in the week beginning 7 September.
Planned strike action from union members includes engineers, station staff and train operators staging walkouts from midnight on 8 September until 9 September and again after midnight on 10 September.
Signallers, service control and Emergency Response Union (ERU) members will strike on 9 September and again, without ERU members, on 11 September.
Track access controllers, LU control centre staff, power/control teams and ERU members will also strike on 7 September.
Ruislip depot operational managers will strike from from 18:00 BST on 5 September to 17:59 on 6 September over pay.
More details when available