JJ, what pulled the carriage? interested as had heard this some time ago.
Over the next two years the line was extended further east into the City to Moorgate and, in the other direction, to Hammersmith. Other lines were soon added to the growing network, deeper underground tunnelling was introduced and the steam trains were replaced by electric trains. The first underground electric railway, the City and South London, which ran from near the Bank of England under the Thames to the South Bank, opened in 1890. It was the first line to be called ‘the tube’ and the windowless carriages with their heavily upholstered interiors were popularly known as ‘padded cells’.