Planeaddict:
Whether or not Biman have traffic rights (I assume that's what you mean) unless the demographic has changed in the Midlands, the main communities from the Indian subcontinent resident here are from India (chiefly Punjabi) and from Pakistan. Bangladeshi communities are more resident in the Northwest, and around London. That's why PK fly from BHX, and why Turkmenistan operates so frequently from BHX to Askhabad, where they connect to Amritsar.
I don't know about you, but I wouldn't fly with Biman from BHX to YYZ, even if they were the only operator. I'd prefer Transat, Air Canada or BA!
It's fine and dandy wishing for exotic routes and carriers, but a prerequisite is having market to serve!