Mrs Chowdhury arrived in the UK from the small city of Sylhet in north-east Bangladesh last year.

BBC: London project gives immigrants lessons in being British

One reason is the high incidence of migration from poor, rural parts of South Asia, such as Mirpur in Kashmir and Sylhet in Bangladesh.

ECONOMIST: Islam in Britain and South Asia

Unocal says the export of gas from its Bibiyana gas field in Bangladesh's Sylhet region will bring in an estimated 3.7 billion US dollars in revenue for Dhaka.

BBC: Bangladesh edges toward gas exports