The East Coast Main Line will close on Tuesday, 18 July, as the UK braces for record temperatures to be broken. Meteorologists predict the record high of 38.7 degrees could be beaten by a record heatwave. Even if the temperature doesn’t reach that level, the next few days are still going to be hot and bothered for rail engineers across the UK. On Sunday evening, Network Rail said they would close the southern section of the East Coast Main Line from noon on Tuesday, halting almost all traffic from London to York and Leeds.