There are delays and cancellations on First Great Western services between London Paddington and Reading after a person was hit by a train. Some lines are blocked and other trains could be cancelled while emergency crews are on site.
It could add 30 minutes to journeys and will affect travel times to and from the westcountry.
More top news
Friday will start cloudy with showers and some bright spells. Temperatures could reach 19 or 20 C but with outbreaks of heavy rain later
The actor and comedian Eddie Izzard is taking his 'Stand up for Europe' campaign to students in Bristol ahead of the EU Referendum
Friday should start off nicely with lots of bright spells and only the odd shower. The afternoon will be warm with heavy rain in places