In Pictures: Incoming PMs savour the moment as they cross threshold of power

Boris Johnson has become the latest Prime Minister to stand in front of the door of 10 Downing Street and tell the world the Queen has invited him to form a government.

Here, PA looks back at an age-old ritual in UK politics which sees the removal vans clear out the belongings of the former occupant of Number 10 before leaving the scene clear for the new prime minister.

Homburg hats are no longer in fashion and police uniforms may have changed, but the men and women who have gone before have always allowed the media to immortalise the moment.