The UKIP primary for the 2012 London mayoral election yielded a win for David Coburn (who would quit the party in 2018) with 40% of the votes.
The six candidates were David Coburn, Michael Corby, Michael McGough, Paul Oakley, Winston McKenzie and Lawrence Webb. On 5 September 2011, Webb was selected by London members as the UKIP candidate. 
UKIP primary David Coburn 29% 
