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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The first Blue Moon since 2012 will appear over the UK on Friday. The next won't be until 2018.
Other hate crimes against muslims and gay people have also risen.
Archie's mum was fed up with the balloon floating around her living room so suggested he let it go to see how far it could travel.