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.
It comes after BBC London revealed, in October, his declaration on the official City Hall register was incorrect and late.
A spokesperson for Sir Sadiq Khan said: “Any gift accepted by the mayor is declared openly and transparently. In this case there was an administrative error which was corrected.”
The mayor received six tickets worth about £3,000 from a private events company to watch the American star from a box at Wembley Stadium on 15 August.
There were five other members of City Hall staff with him, including two senior officials.
Conservative Assembly Member Susan Hall wrote to the GLA’s monitoring officer Rory McKenna, claiming the mayor had appeared to “contravene” the gifts and hospitality procedure.
She said there were potential issues raised by the mayor receiving hospitality and being hosted in the box by a private company which has worked for City Hall.
The Tories asked whether there was any reason a technical fault could have “legitimately prevented a timely declaration” of the tickets, and why changes were subsequently made on the register.
The monitoring officer was also asked to clarify the rules about accepting gifts and hospitality from contractors and external suppliers who have had contracts with the GLA.
A spokesperson for the GLA said the monitoring officer reviewed the complaint against the mayor and would not be investigating three of the four allegations.
It added, an investigation will now take place to establish if the mayor “exercised an appropriate level of caution” in deciding to accept the tickets.
Ms Hall said: “Whilst I welcome an investigation into the propriety of accepting these tickets, after months of asking Khan for answers, I am disappointed that the monitoring officer isn’t considering the fact that the mayor declared these tickets late, initially mis-declared who donated them, that they were undervalued, or that the donor was a GLA contractor.”
“More answers are desperately needed,” she added.
A spokesperson for Sir Sadiq said: “The mayor has no involvement in the procurement process for GLA events, nor in the tendering of these contracts.
“The mayor’s office will continue to ensure all the right processes are followed, and looks forward to explaining the approach that was taken in this instance.”
