Bangladeshi food is not the same as the food in West Bengal, In W.Bengal people are mainly vegetarians. Due to a lot of foreign invasions we have so many Meat and Chicken dishes. For example 'Akbori chicken' is a main example especially in Sylheti families. Bangladeshis consume way too much Rice, we buy 24kg Tilda/Tolly boy basmati rice, we buy these nearly every week. Not forgetting the expenditure on Chicken and Meat. Fish is something the old folks like, while the younger generation tend to consume more Meat and Chicken.
'Indian cuisine' restaurants in actual fact, are not ran by Indians. 70% of the curry industry in the UK is dominated by Bangladeshis and some of the best and luxurious restaurants have been visiting by prominent people such as politicians,celebrities etc. Bangladeshis contribute £2bn from the curry industry to the economy.
And I'm sorry but my Pakistani mates cannot hack spices, they panic over a petty mild sauce in the local Chicken and Chip shop. During Ramadan, I have Pakistani neighbours on both sides, they make a tasteful Falooda as well as some tasty chaat etc. But from what I've experienced, Pakistani Saalan and other things are excessively oily. The meat saalan is like a oily swimming pool. In Pakistani Masjids, during Ihtikaaf or Iftar, there's always a Bangali chef as Bangali chefs are reputable chefs here the England.