Sunak’s top adviser interviewed as witness in election date betting investigation

Rishi Sunak's chief of staff, Liam Booth-Smith, outside Conservative headquarters in London. Photograph: ZUMA Press, Inc./Alamy

Rishi Sunak’s most senior adviser has been interviewed as a witness by officials at the Gambling Commission as part of its investigation into widespread betting by Westminster figures on the date and outcome of the general election.

Liam Booth-Smith, the prime minister’s chief of staff, spoke to the regulator last week after a series of revelations about betting by people close to the prime minister on the date of the election.