Read this and answer the question. If the question is unanswerable, say "unanswerable".

The party's performance held up in local elections in 2012 with Labour consolidating its position in the North and Midlands, while also regaining some ground in Southern England. In Wales the party enjoyed good successes, regaining control of most Welsh Councils lost in 2008, including the capital city, Cardiff. In Scotland, Labour's held overall control of Glasgow City Council despite some predictions to the contrary, and also enjoyed a +3.26 swing across Scotland. In London, results were mixed for the party; Ken Livingstone lost the election for Mayor of London, but the party gained its highest ever representation in the Greater London Authority in the concurrent assembly election.

Who won the London mayor election?
unanswerable