Dear Hamdi,
Please choose an MBA that is placed in the financial times list or Gordon Brown's HSMP list as this represent the recognised top programme, currently there are 10 of UK schools in the list, notably London Business School, Manchester Business School, Said Business School, Strathclyde Business School, Warwick Business School..Bradford School of Management.
This two ranking measures the employability in terms of salary, amongst others. I will suggest that you look into Bradford as the programme is excellent and the facilities are superb! It is also ranked 4th in the world, ahead of Chicago, INSEAD and London in terms of value for money!!! ie low costs but highest returns in terms of outcome.
Forget an MBA in XXX as an MBA is supposedly generic so it is oxymoron!
Forget Birmingham as well!