"As a departing train disappears round the corner at Bank underground station in the heart of London's financial district, a lone woman waits for the next service. This is the grim face of 90s tube travel is seen here in a wide landscape of rounded tunnel and the curve of the station platform on the Central Line. The Central line is a London Underground line, coloured red on the tube map. It is a deep-level ""tube"" line, running east-west across London, and, at 76 km (47 mi). Incorporated in 1891 it is today the longest Underground line and also the busiest with around 260 million passengers a year."
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