The BBC
A Met Police spokesperson said the alleged incident fell outside the three-year deadline for initiating proceedings related to pandemic-era legislation.
The Conservatives had called for an investigation into whether a meeting at Labour Party headquarters on Christmas Eve in 2020 broke the law.
Sir Keir, who has denied breaking lockdown rules, said he was working in his office at the time on his response to Boris Johnson’s Brexit deal.
Earlier, Downing Street said communication skills specialist Leonie Mellinger was “a core part of a small team” working with Sir Keir, then leader of the opposition, during the pandemic.
She is understood to have joined both Sir Keir and then-shadow chancellor Rachel Reeves to help him prepare for Covid statements and press conferences.
No 10 would not be drawn on how many times they met or how many people were present but said the prime minister believed it was not reasonably possible for Ms Mellinger to do her job from home, as she had done on other occasions.
Sir Keir’s spokeswoman said it was “a hugely significant moment for the country and it was in line with the requirements that you could go to work if were you able to do so”.
She dismissed Tory criticism as “desperate mudslinging”.
