fellow nairalanders, i need your sincere advice in this. I was just given admission to study study Diploma in Information Technology in Greenwich college london. The mimimum amount to pay has also been stipulated for me. I want to know whether it is advisable to pay the money. How easy is it to secure study visa for a diploma programme? Your advice will be highly appreciated.

They seldom give visa for diploma courses in the UK. Your best bet will be to apply to an accredited college for either a bachelor or master degree.
Good luck.

Thanks for your advice. More advices are still welcome.

If you have money for fees, by all means do pay. Monies are usually refundable if you are denied visa; but confirm with your prospective school's policies.

Diploma or degree? I don't know how that affects issuance of visa

Here are the latest guidelines on student visas, from the Home Office

http://www.ind.homeoffice.gov.uk/documents/idischapter3/section1.pdf?view=Binary

You need to check that the college is on the Register of Education and Training Providers
and that your course meets the other requirements.
If not, it's not worth applying.
If it meets these requirements, you could apply, but whether or not you'll be successful depends on a lot of things, including your financial situation.