Heathrow Express trains will run between London Paddington and Heathrow Airport every 15 minutes. Trains will operate according to the normal timetable.
Heathrow Express Director, Fraser Brown, said: “As with the last two strikes this summer, our services will be running as normal. Our staff will be on hand to assist passengers with their onward journey from Heathrow.
“We would always advise passengers to check before they travel, and leave extra time for travelling. We will be keeping them up to date on our website, heathrowexpress.com, and on Twitter, @heathrowexpress.”
London Underground workers who are members of the RMT, Unite and TSSA unions will walk out for 24 hours from 18.30 on Tuesday August 25, and for a further 24 hours from 18.30 on Thursday August 27. This industrial action is due to a dispute over plans to introduce a 24-hour tube service later this year.
Heathrow Connect services are due to run as normal. The free shuttle service, which takes passengers from Heathrow Terminals 2 and 3 to Terminal 4, will also be unaffected.
London Underground services are expected to be affected from 16.30 on Tuesday and Thursday. Services will be suspended all day on Wednesday and Friday.