The Conservative Party has been urged to return a £160,000 donation it received from the wife of one of Vladimir Putin's former ministers for a tennis match with David Cameron and Boris Johnson.
Banker Lubov Chernukhin, whose husband served in the Russian Cabinet in 2000, made the winning bid for a doubles match last month.
It is one of more than £900,000 of donations that Labour say the Tories have received from people with links to the Russian government or "who may be hit by the sorts of sanctions" sought by the PM.
Opposition figures have called on the Prime Minister to ensure the money is returned, with MP Sheila Gilmore saying: "There can be no impression of conflicts of interest or hypocrisy at such an important time."
Come on David Cameron. Pay back the Tory donations from Putins pals
A Conservative spokesman said: "All donations to the Conservative Party are fully and transparently declared to the Electoral Commission and published on their website."
More top news
Windy and wet weather to end the month of May
They made it across a deadly sea this year, but their journey to what they hope will be political asylum had only just begun.
Scientists used modern forensic techniques to review the 'cold case' and determine the victim was probably killed by two blows to the head.