50 years ago this year, back in 1971, bangladesh became a new country. tv: many of these people have spent most of the past - nine months running away from somebody who wanted to kill them. it was a painful road to independence. tv: the new flag of bangladesh, a state of bengal. _ i've never seen this footage. bangladesh! my dad migrated from bangladesh to england in the 19705... ..to a land in which he did not know the language of, he didn't know anyone there. he came in the hope and in the pursuit of a better life. tv: there's an estimated 50,000 bangladeshis in london, - many of them living in brick lane. i'm not going to lie, a lot of those haircuts still exist amongst bengali uncles. the immigrant dream,