Engineering work is taking place between Southall and Hayes & Harlington, closing some lines on Saturday evening and Sunday morning.
Saturday:
After 20:20, Heathrow Express services between London Paddington and Heathrow Terminal 5 will run to a reduced, half-hourly service.
Sunday:
From the start of service until 07:15, Heathrow Express services between London Paddington and Heathrow Terminal 5 will run to a reduced, half-hourly service.
Check before you travel:
These changes are not currently shown in the National Rail Enquiries Journey Planner, please check back nearer to the time of travel.