Mayor Jules Pipe, the Chair of London Councils and Mayor of Hackney, told the London Assembly that the Government's plans to cut housing benefits have not stopped rents being increased over the last 18 months.
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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.