Don't ask your friend, curvybird - ask your doctor. Your GP can refer you if there is funding for this sort of operation in your PCT area - but I do have to say that in most places at the moment, all non-urgent referrals for many operations etc are being held back because the NHS has to save millions of pounds before 1 April. It may take some time however if you can be referred to a consultant so it's not impossible, the only way you will know is to ask your GP.
I sympathise with you, I used to work with a girl who had exactly the same problems, but she had to live with it - proper suitable bras (unfortunately usually quite expensive to get the right uplift) helped her a lot.