Engineering work is affecting First Great Western services between London Paddington and Bristol Temple Meads and Wales. An hourly service is running.
Trains are diverted via Oxford won't call at Reading or Didcot. There are buses between Swindon and Reading.
The London Paddington to Cheltenham service is also affected. Trains are only running to and from Didcot. Passengers for London should change at Oxford.
More top news
People have been spotted 'tombstoning' off Plymouth Hoe, despite numerous warnings about the dangers.
Decontamination work is to begin at nine sites across the city.
Raynor Winn and her husband Moth lost their home, their business and also learnt Moth was terminally ill - all in the space of a few days.