But now Sadiq Khan is to face his own humiliation as protesters prepare to launch an inflatable showing the London mayor dressed in a bright-yellow bikini.

Organisers raised more than £58,000 online to pay for the blimp of Mr Khan following the furore over the 20ft balloon, dubbed ‘Trump Baby’, which was granted permission to rise above Parliament Square during the US President’s visit last month.

The inflatable depicting a bikini-clad Mr Khan, which is slightly larger than its rival at 29ft, will be flown in the same Westminster location on Saturday morning.