The former Canadian High Commissioner to Britain has been accused of sexually assaulting an embassy worker by grabbing her bottom.

Gordon Campbell, who served as the Mayor of Vancouver and the Premier of British Columbia, allegedly groped Judith Prins, 54, as she climbed the main staircase of Canada House in January 2013.

The former embassy worker said she felt 'humiliated and disrespected' when Mr Campbell reportedly put his hand on her backside as he followed closely behind her, the Telegraph reported.

Gordon Campbell, who served as the Mayor of Vancouver and the Premier of British Columbia, allegedly groped Judith Prins

Scotland Yard is now investigating the allegation after it was reported last month - and the complaint has since been passed to the Foreign Office.

In a complaint submitted to the Canadian embassy, Ms Prins said: 'I distinctly remember this hand went up my backside. It was significant. It wasn't, "Oops, sorry I brushed you." It was definitely someone having a feel.'

Scotland Yard is now investigating the allegation after it was reported last month (Pictured, Gordon Campbell inside Canada House)

Ms Prins said Mr Campbell then 'carried on as if it was business as usual' and paid 'no regard' for what he had done.

The embassy worker raised the issue a few weeks later with Mark Fletcher, the consul general.

But it was in November that the 54-year-old decided to put forward a formal complaint against the former Premier - after she saw him on television laying a wreath on the Cenotaph alongside the Queen.

The complaint allegedly contained details of further incidents involving Mr Campbell in which he made comments about her appearance and engaged in non-sexual touching which made her 'uncomfortable'.

Ms Prins then entered into a settlement agreement and her complaint was withdrawn, reports say.

The former embassy worker said she did not contact the police at the time as she was unaware his alleged actions were a criminal offence.

But she eventually lodged a formal allegation of sexual assault by touching against Mr Campbell in January this year.

The Foreign Office is now speaking to Canadian officials over the matter.

A spokesman for Mr Campbell said: 'This complaint was transparently disclosed and became the subject of a full due diligence investigation at the time by the government of Canada and was found to be without merit.'

Ms Prins decided to put forward a formal complaint against Gordon Campbell (Pictured with the Queen and Prince Philip) after she saw him on television laying a wreath on the Cenotaph

Metropolitan Police said told CBC: 'A 54-year-old woman contacted police on 3 January 2019 and alleged she had been sexually assaulted at an address in Grosvenor Square.'

The force confirmed no arrests have been made. It said it was unable to comment on whether or not Mr Campbell was the subject of the allegation.

A spokesperson said: 'The [Metropolitan Police] does not identify any person who may, or may not be, subject to an investigation.'