Diane Abbott
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Labour's Abbott and Khan enter enter race for London mayor

The campaign has began in earnest to find out who will become Labour's candidate for London mayor in 2016.

Sadiq Khan, the party's MP for Tooting, has officially entered the race and Diane Abbott, the MP for Hackney North and Stoke Newington, reiterated her bid to stand.

BBC London's political correspondent Karl Mercer reports.

  • 14 May 2015