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Sophie Grégoire Trudeau tested positive for Covid-19 just over a week after a high-profile event in London where she was filmed hugging the singer Leona Lewis and kissing the former Australian prime minister Julia Gillard, Matthew Weaver reports.

The wife of the Canadian prime minister was also photographed at the Wembley Arena We Day event on 4 March alongside the F1 driver Lewis Hamilton and the actor Idris Elba. Four days later, Grégoire Trudeau went to an International Women’s Day party attended by the former supreme court president Lady Hale.

It is feared Grégoire Trudeau may have contracted the virus during her London trip. She reported feeling unwell following her return to Canada earlier this week.