David Cameron has announced a £30m boost to the start-up loans scheme, bringing the fund to £110m. London entrepreneurs have benefited the most, with 34% of them going to people in the capital.
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Around 60 firefighters tackled the blaze at the four-storey building in Daleham Gardens, Hampstead, that broke out early on Tuesday.
It is the fourth time in five years that the London borough has topped the rankings, according to data from the ONS.
Catherine Burke's body was discovered at a house in a quiet street in Muswell Hill last Thursday evening.