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Theresa May could be forced to come clean on the source of Tory cash linked to Russia.

A report on meddling in UK politics by Vladimir Putin’s regime urges the Electoral Commission to devise “more stringent requirements for major donors to demonstrate the source of donations”.

The intervention by MPs on the Digital, Culture, Media and Sport Committee comes after a Mirror probe revealed the Prime Minister accepted a £50,000 donation from the wife of a former Russian minister – on the day she blamed Moscow for the Skripal poisoning.

In total, Mrs May has let more than £800,000 from Russia-linked sources into Tory coffers while PM.

(Image: REUTERS) (Image: Getty Images Europe)

Shadow Cabinet Office Minister Jon Trickett said she should hand it all back, adding: “Serious questions must be answered about why she thinks it is appropriate to accept this money after warning about Russian interference in the UK.”

And Lib Dem spokeswoman Christine Jardine said her “refusal” to explain donations “threatens the integrity of our democracy”.

A Tory spokesman said all donations are properly declared and comply with the law.

(Image: Getty Images Europe)