Many flags, such as national flags and that of the United Nations, are exempt from requiring permission - but not the EU flag. / City Hall is unable to fly the EU flag outside its Newham HQ on the anniversary of Brexit, after a 2021 change to legislation means it could be prosecuted unless planning permission is granted.

Sadiq Khan has defended his blocked attempt to fly the EU flag above his office on the seventh anniversary of the referendum to leave the bloc while speaking to voters on LBC's Speak to Sadiq.

We must rejoin the single market, the London Mayor told LBC, branding leaving the EU as "the biggest piece of self-inflicted harm ever done to a country."

Forecasts show the capital would have as many as 87,000 fewer jobs, with its economic output 2 per cent lower in 2030 than would otherwise be the case.