Traffic brought one of London's most iconic streets to a standstill - yet for once it was not due to the volume of vehicles on the road.
Regent Street was shut for a festival exploring how public transport in the capital has changed through the ages.
The event saw Tube trains, horse-drawn carriages and old Routemasters parked alongside exhibits exploring how travel will change in the future.
It was organised by Transport for London and the London Transport Museum.