By Jessica Frank-Keyes Sadiq Khan has a 24-point lead ahead of his nearest rival as he bids for re-election to a record third term at City Hall. When pollsters at Savanta, working with the independent Centre for London think tank, asked for Londoners’ voting intentions, the Labour mayor scored 51 per cent of support. Conservative mayoral hopeful Susan Hall came in on 27 per cent, while Liberal Democrat candidate Rob Blackie was on 10 per cent, Green Party contender Zoë Garbett scored eight per cent, and Reform UK’s candidate Howard Cox had just two per cent support. However, Sadiq Khan’s lead …