Labour leader Sir Keir Starmer and deputy leader Angela Rayner have both received questionnaires from Durham Constabulary in relation to a potential breach of lockdown rules in April 2021.
Sir Keir has come under pressure over an event in Durham in April 2021 with party colleagues when he was filmed having a drink and a takeaway curry was ordered – dubbed ‘beergate’.
The Labour leader has said he will offer his resignation if he is issued a fixed penalty notice for breaking COVID rules.
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A Labour Party spokesperson said: “Keir Starmer and Angela Rayner have received questionnaires from Durham Constabulary.”
Sir Keir, who has fiercely criticised Boris Johnson’s rule-breaking in Downing Street, has previously said he was absolutely clear that no laws were broken” in his case.
Ms Rayner has also said no rules were broken and made a similar pledge that she would quit if fined.
At the time COVID rules banned household mixing indoors apart from working.
Labour has claimed it can prove the curry and beers shared by its team were part of a long working day preparing for the Hartlepool by-election.
However, Durham police opened an investigation after calls from Tory MPs for them to investigate the incident.
Earlier this month, Sir Keir told Sky News: “We were in the office, we were working, we paused for something to eat, there was no party, no rules were broken and that is the long and short of it.”
Durham police’s investigation is set to carry on at least until June, when any of the at least 15 people present could face a penalty if it is deemed they broke the law.