What is referred to as 'Chawls' in Bombay ? With which kind of London housing can these be compared ? How are these similar?

[prasanna]

Chawls are multi-storeyed structures which are divided into smaller one-room tenements without
any private toilets. These are the dwelling houses of the urban poor in Bombay mostly owned by private landlords. Chawls were used to make quick money. Many families could reside in every chawl.
Chawls could be compared to tenements of London, which were also small apartments built for the poor workers of London.