The mayor of London will be investigated by the Greater London Authority (GLA) over his acceptance of free tickets to a Taylor Swift concert. The Tories in the London Assembly asked the GLA's monitoring officer to probe a potential breach of the rules.

Sadiq Khan reportedly accepted £3000 (around $3,600) worth of Swift gig tickets when she was in London on her Eras Tour last August.

Watchdog to examine whether Labour Mayor of London ‘exercised appropriate level of caution’ when he accepted invite to attend star’s show