Liz Truss in New York during her short tenure as PM (Picture: Getty Images)

Liz Truss fuelled herself with a constant stream of double espressos while imposing diva-like demands on her staff during her time as foreign secretary, says a new book.

The former prime minister had a rider for foreign trips that saw her likened to a rock star and was more interested in her social media than being briefed for meetings, according to Out Of The Blue by political writers Harry Cole and James Heale.

Diplomats and dignitaries were said to be kept waiting until she had secured photo opportunities she was happy with.

The biography details a six-hour trip to Sydney which was mostly consumed with staging a photo of Ms Truss riding a British bicycle underneath a Union Jack umbrella.

A trip to Tokyo involved her risking her life during an hour on the world’s busiest pedestrian crossing to get another photo, the book claims.

The rider was forwarded to British embassies abroad ahead of foreign trips demanding ‘freshly prepared food, no pre-made or plastic packed sandwiches’ with ‘bagels or sushi for lunch’, a bottle of sauvignon blanc a night, and ‘absolutely no mayonnaise’.

Taking a snap during her time as chief secretary to the Treasury in London (Picture: Getty)

In extracts serialised in The Sunday Times, former aide Kirsty Buchanan said Ms Truss drank ‘about 42,000 espressos a day or she used to when I worked for her’.

The rider was forwarded to British embassies abroad ahead of foreign trips.