I've only gone and done it

After consulting the The National Gamete Donation Trust website and drilling down I found the list of licensed Donor Clinics (PDF download).

If you don't use a licensed donor clinic there are potential legal implications (such as 18 years of Child Support via the CSA) that really isn't worth the risk.

There are a few licensed clinics within a reasonable distance - although not exactly an around-the-corner trip. I've decided that the NHS need all the funding they can get, so they'll be the chaps getting my donation. Quite reasonably they have an on-line application form. Form has been duly submitted and sent. The only way this could get better if they could accept your donation as an email attachment.

What is surprising is the limited numbers of Clinics - 35 in England, Scotland, Wales and Northern Ireland. With 6 of those in London.

There is no wondering why there is a shortage - not much choice when it comes to dropping off your contribution.