Question

what was the problem created by railway in London

Answer 1

The path-breaker was the City & South London in 1890, the first electric underground railway in the world. A number of lines were driven through that became the Piccadilly, Bakerloo and Northern lines. They provided cheap frequent and quick journeys from the inner suburbs.

Answer 2

houses of working class people were cleared to construct railways.
roads were dug and kept open
problems after construction:
they were considered as iron monsters.
they lacked oxygen supply.