Cars delivering guests to the Le Meridien Grosvenor House Hotel (where suites cost up to £1,187 per night) and the Dorchester Hotel will be able to use the hotels' main entrances on Park Lane for nothing. Delivery vehicles using the loading bays round the back will have to pay the £5 charge.
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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.