Daughter, 8, left at pub by Camerons

The couple’s daughter Nancy wandered off to the toilets while they were arranging lifts and they only realised she was not with them when they got home, The Sun said.

Mrs Cameron rushed back to the Plough Inn in Cadsden, Bucks, where she found her daughter with staff.

A Downing Street spokesman said: “The Prime Minister and Samantha were distraught when they realised Nancy wasn’t with them. Thankfully when they phoned the pub she was there safe and well.”

The Camerons were at the Plough Inn, near the Prime Minister’s country retreat Chequers, with Nancy and their other children Arthur, six, and 22-month-old Florence, as well as two other families.

When Mr Cameron left the pub he went home in one car with his bodyguards and thought Nancy was with his wife and their other children in another car.

Mrs Cameron had assumed her eldest daughter was with her father. The mistake was only discovered when they got home.

Mrs Cameron drove back to the pub and found Nancy helping staff. A Downing Street spokeswoman said the Camerons take full responsibility for looking after their children and were not blaming security officers for failing to ensure that Nancy was with the party before returning to Chequers.