The Piccadilly Line (dark blue) operates from Cockfosters via Hammersmith to Heathrow Terminals 123, Terminal 5 and Terminal 4. The Piccadilly Line has two branches which split at Acton Town. There are 53 stations altogether on the line.
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London Underground's Piccadilly Line provides the most cost-effective rail route between Heathrow and the capital.
THE NORTHERN LINEThe line is served by fifty stations situated on five branch lines. Thirty six of the line's stations are situated underground at deep level. The line is classified as London's busiest service by way of passenger volume. The line is signified by the colour black on an underground map.