hey i aint frm bangladesh...but ive got an answer for you..i did ma medical in london and i just left after the whole process. I was told by a lady that blood tests take about 3 days...if we dnt call u ..theres no problem..and it takes 3-4 working days for ur stuff to be couriered(transported) to the embassy..i went for ma interview and ma stuff was already there..
Good luck!!!!!!