Revealed: Mandelson vetting warned of ties to senior figures in China, Russia and Israel

Exclusive: Vetting officials also flagged 1m loan when recommending he should be denied security clearance

• Key questions: did mitigations' cover links to China and Russia?

Peter Mandelson's associations with senior figures in China, Russia and Israel were among the concerns raised by the UK's vetting agency when it concluded he should be denied clearance, multiple sources have told the Guardian.

Mandelson's links to China's minister of finance, Lan Fo'an, the sanctions-hit Russian oligarch Oleg Deripaska and a former Israeli military intelligence general, Tamir Hayman, were all flagged by the agency as areas of concern shortly before he took up his post as the UK's ambassador to the US, the sources said.