A dossier detailing Lord Mandelson’s alleged links to China has been handed to the FBI and could further complicate his chances of being accepted as ambassador to the US by Donald Trump.

The memo, compiled using open source information from the Chinese web and delivered by US senators, is said to contain multiple examples of the Labour grandee’s links to the state and its top-ranking officials.

It is the latest step in a long-running furore since Lord Mandelson was picked by Sir Keir Starmer to be Britain’s representative in the US.

The dossier, published in Australian media, includes details of Lord Mandelson’s meetings from 2013 to 2019 with Chinese officials and businessmen, who praised him for his “co-operation”.