Happy 150th Birthday London Underground!

See historic photographs charting the changing face of London's underground network, from its launch 150 years ago to date.

Interior of 1970s London carriage.

One of a series of photographs by Henry Flather showing the construction, undertaken
between 1866 and 1870, of the Metropolitan Railway's underground lines between
Farringdon and Paddington and on to Kensington. It now forms part of the existing
District and Circle lines on the London underground. The construction work, utilising the
'cut and cover' technique, caused a lot of disruption to London neighbourhoods. Praed Street
Station, now known as Paddington, is hidden from view by the beer house in the centre
of the picture.

Soldiers returning home on tube after the end of the second world war, 1945

Interior of 1970s London carriage.

Many more pics at guardian.co.uk