Edwardian Tube passengers have gathered at Baker Street station to honour 100 years of the Bakerloo Line.
The line was first called the Baker Street and Waterloo Railway
London Underground's Tim O'Toole joined the costumed commuters on Friday to present a Bakerloo Centenary commemorative plaque.
Actors and staff in Edwardian dress also entertained commuters as they travelled on the trains.
The station opened on 10 March 1906 and initially ran between Baker Street and Lambeth North.
Originally known as the Baker Street and Waterloo Railway, the name was officially changed in July 1906 to the Bakerloo Railway reflecting a nickname coined by the Evening News.
Kevin Bootle, manager of the line, said: "It is about celebrating our heritage and history."
In 1915 Maida Vale became the first station to be staffed by women only during wartime years, he said.
In the same year, the Bakerloo Line was extended from Baker Street to Queen's Park and then further north over existing suburban railway tracks to Watford Junction by 1917. In 1939, a new-tunnelled section was built from Baker Street to Finchley Road, which allowed Bakerloo trains to take over the Metropolitan Line's service, originally started in 1932, to Stanmore.
In 1982, the service beyond Queen's Park to Watford Junction, by then only four peak period trains, was withdrawn.
Centenary plaques will be hung in the foyers at every station along the line.