Number 10 has confirmed to the UK’s press that PM Boris Johnson’s fine for breaching Covid regulations was because of his birthday party.

The hour-long gathering was held in the Cabinet Room on June 19 2020.

A No 10 spokesperson said: ‘The Met Police have now explained that the FPN [fixed penalty notice] issued to the PM will be in relation to the following incident: On 19 June 2020 at the Cabinet Room 10 Downing Street between 14:00 and 15:00 you participated in a gathering of two or more people indoors in the Cabinet Room at 10 Downing Street.’

According to an ITV report, the PM was presented with a birthday cake while people sang Happy Birthday to him.

The PM and the Chancellor are both facing calls to resign now they have been fined. Boris Johnson had repeatedly told the Commons there had been no parties in Downing Street during lockdowns, which given this latest development means he has almost certainly misled the House and should, under the Ministerial Code, resign.