Strike update: We've taken 50 calls & attended 1 small fire, 2 RTA's which required no action & a false alarm caused by a smoking toaster.
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One professor warns of a 'potentially disastrous capacity crunch'.
A number of families were on board the service from London Euston to Stoke. One family left the train early to escape the abuse.
She's called Amy, and was visiting a hospital.