Update 2023-12-06 (2): According to reports, Heathrow Express rail services will be suspended before 7 am and after 7:15 pm on Thursday (7 December, local time) due to the strike. Elizabeth and Piccadilly line services will operate normally on Thursday (7 December).
Update 2023-12-06 (1): According to reports, due to the ongoing ASLEF rail strike, Gatwick Express, South Western Railway, Southern, Southeastern, and Island Line (Isel of Wight) services will be limited or fully suspended on Wednesday (6 December). Gatwick Express services will be suspended on Wednesday (6 December), with the exception of a shuttle service between Gatwick Airport and London Victoria. South Western Railway will only offer services between Waterloo and Basingstoke/Woking/Guildford/Feltham and Basingstoke to Salisbury on Wednesday (6 December). No Southeastern or Island Line services will operate on Wednesday.