South West train operator GWR has issued a warning to travellers as temperatures in Britain are set to reach record-breaking highs this week.
GWR urged people to only travel if "absolutely necessary" on Monday and Tuesday (July 18 and 19) as the country's first-ever red heat warning comes into effect in much of England.
Temperatures are forecast to hit up to 41°C this week, with rail operators, including GWR, warning journeys could be longer - and disrupted. People are being advised to check journeys before they travel.