Our Entertainment Correspondent Lucrezia Millarini has sent these snaps from the O2 Arena.
She's there watching the Cirque Due Soleil rehearse their new show.
More top news
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.