Queen Mary’s polling data was quoted in the Evening Standard in a feature on Sadiq Khan’s mayoral rating ahead of next year’s election. Mr Khan saw his net popularity score fall to -1 in May, with 30 per cent of respondents satisfied and 31 per cent dissatisfied with his performance, according to the YouGov survey of 1,272 Londoners. However another as-yet unpublished Greater London Authority poll conducted last month is understood to have given Mr Khan a +4 point rating. The first assessment of the chances of former cabinet minister Rory Stewart, who declared he was running for Mayor as an independent after quitting the Tory party on October 3, is due next month. That poll, by Queen Mary University of London, will ask voters who they will support on May 7. The other main challengers to Mr Khan are Tory Shaun Bailey, Lib-Dem Siobhan Benita and Green Sian Berry.Find out moreAlso featured in: MSN, City AM