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| | London Underground - Wikipedia, the free encyclopedia |
 | | The Metropolitan Railway, the first section of the London Underground, initially ran between Paddington (Bishop's Bridge), now just Paddington, and Farringdon Street, a temporary station just north-west of the present Farringdon station, and was the world's first urban underground passenger-carrying railway. |
 | | The lack of lines in south London is sometimes attributed to the geology of that area, the region being almost one large aquifer; additionally, it is impossible for cut and cover lines to go under the River Thames. |
 | | Another reason is that during the great period of tube-building in the early 20th century south London was already well served by the efficiently-run suburban lines of the London and South Western Railway and the London, Brighton and South Coast Railway, then being electrified, which obviated Underground expansion into those areas. |
| en.wikipedia.org /wiki/London_Underground (4348 words) |
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