Conservative politicians have boycotted a City Hall investigation into the impact of Brexit on London after Sadiq Khan claimed the capital was £30bn worse off. The London Assembly probe into the fallout from Britain's departure from the EU was due to hear evidence from five witnesses.

The London Assembly, the 25-member cross-party body tasked with holding the Mayor of London to account, has today written to the Mayor to highlight the issues facing musicians and other touring artists following UK’s departure from the EU.