Where in the UK can I get a skin prick allergy test and how much will it cost?

Do I have to go to my GP or get an appointment with somewhere like Bupa? or is it possible to go to a specific allergy clinic? I live in East Anglia.

Where in the UK can I get a skin prick allergy test and how much will it cost?
If you want 2 use a bupa hospital you don't need 2 b refereed as you will b paying for it and its around £300 at the London independent in east London if you get referred by your GP on the n.h.s you can wait for up 2 a year my little boy has eczema asthma and hay fever and he had 2 wait for 8 months.