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In the latest episode of “partygate”, the long-running series devised by Number 10, a photograph published by the Guardian from May last year shows the person running the government and her husband (Boris Johnson) drinking with aides in the Downing Street garden – despite mixing between households being limited to two people at the time.

At least a dozen Downing Street staff are seen in the picture, including someone who appears to be the then-PM’s special adviser Dominic Cummings, who on the same month went for his unforeseen “eye-test” up in Barnard Castle.

Dominic Raab, the Justice Secretary, was tasked with defending Boris on the morning media round. It didn’t go well. He told Times Radio that 10 Downing Street is Johnson’s home as well as his workplace, and that it was “palpably not a social gathering because you had people in work suits”.

Only the PM and one other attendee appear to be wearing a suit. And anyway, why does the wearing of work clothes prove that this isn’t a social gathering? Pubs and restaurants every week across the land – when they’re not closed by government Covid orders – contain people drinking and taking part in social gatherings while wearing clothes they went to work in.

This is the thirteenth such alleged unlawful gathering to have taken place during lockdown, and adds to senior civil servant Sue Gray’s long list of investigations into illicit gatherings by the people who really should have been setting an example.