Hi,
As far as I'm aware, there are no UK schools that will meet your requirements. To be honest, as a Brit with a U.S. bachelors and 16.7% (!!) through an online MBA from the University of Phoenix, I would look to the USA.
It seems like a lot of hassle to begin with but they are usually very geared up for international students with international qualifications. ERAU (Embry-Riddel,
www.erau.edu ) is probably your best bet. If you have 'A' levels, or equivalent, you will receive academic credits for them, which can get you moving quickly on down the road. I also got credits for a couple of foundation courses (Sciences & Social Sciences) I did with the Open University.
Also, if it is really a business management degree you are looking for, I would go with the University of Phoenix (
www.phoenix.edu ). Their courses are designed for the internet from the outset, rather than normal study materials (poorly) adapted for the online environment. I have been delighted with my experience there. The local office is in Holland and my advisors - academic and financial - have been really helpful!
The only issue I faced was to learn to write in American English, ie., in the active rather than the passive and with the different spellings but, of course, MS Word will sort all of that out for you!
Good Luck!!