Rail passengers are being urged not to travel, particularly in southern England or the Midlands, as temperatures threaten to exceed 35 degrees over the next few days. Train operators are warning that speed restrictions will be necessary as rail temperatures climb, and the Met Office has issued a red ‘extreme heat’ warning for much of England.

There will be no trains between Luton and Bedford this week, as engineers work on removing the two trains which collided south of Bedford on Friday, killing a driver and injuring 100 passengers. Last night, nine of the injured passengers were still in critical condition in hospital, and inspectors from the Rail Accident Investigation Branch have been gathering evidence over the weekend.