Darren Johnson added:
In light of today’s tragic incident as well as concerns raised by disability and other campaign groups, the Mayor should order an immediate halt to the production of these vehicles. Londoners’ safety must come first and there are serious doubts hanging over the Mayor’s flagship bus today
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The Tooting MP has been the frontrunner in the counting process ahead of Tory challenger Zac Goldsmith.
It's not just London where elections have been taking place today. There were council elections taking place across the home counties.
A list of results for London Mayor and the London Assembly