All day, most High Speed trains to and from London Paddington will be retimed. Many trains will depart EARLIER than usual.

Most fast trains between London Paddington and Oxford will not call at Slough. Slough will be served by additional calls in other services (see below).

Trains between London Paddington and Swindon / Bristol Parkway / Cardiff Central will call additionally at Slough, Maidenhead and Twyford.

All day, most local stopping trains from London Paddington to Reading and Didcot Parkway will only run between Reading and Didcot Parkway. Passengers at Slough, Maidenhead and Twyford should use services running between London Paddington and Swindon / Bristol Parkway / Cardiff Central (see above).

Passengers should check their journeys at nationalrail.co.uk