Boy band McFly are performing in Oxford Street today to mark the start of a car-free day in the West End.
Oxford Street and Regent Street are pedestrian-only today for the eighth year running.
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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.
Residents said living next to the 40 foot high stinking mound was a 'living nightmare'.