Officials from Number 10 have been caught on camera laughing about a Christmas party that Downing Street has insisted never happened.

The footage, filmed last December, shows a rehearsal for a news conference.

Allegra Stratton, the Prime Minister's then-press secretary, jokes about a "business meeting" and a "cheese and wine" event that was "not socially-distanced".

Prime Minister Boris Johnson has insisted for several days the event - allegedly held during lockdown - did not happen.

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