Train problems 'could last until weekend'
Severe disruption on the railways caused by "extremely high" temperatures could affect services on Friday, the Rail Delivery Group (RDG) has warned.
The RDG, which represents train operators and Network Rail, said there was "severe disruption" across the country but particularly around London and the South East of England.
Director Robert Nisbet said the heat was affecting metal track and overhead cables, with 20 out of 26 operators impacted.
Some passengers were stuck in a tunnel

when a train broke down
