An online campaign against Sadiq Khan appeared on Wednesday entitled #KhanMustGo. At the moment it only consists of a snazzy Twitter account, but in just three days has amassed over a thousand followers.
It's not clear who's behind it, but the campaign has been enthusiastically endorsed by a number of cross-party individuals including Martin Daubney of the Brexit Party, Susan Hall (Tory leader in the London Assembly) and London Assembly member Peter Whittle (ex-UKIP).
If you're on Twitter please do your bit to get the hashtag trending #KhanMustGo