From the age of 16 until 34 I gave blood semi regularly. I had to stop for a few years due to the drugs I was on but when I was able I tried to make an appointment with the blood service only to be told that they have no need for my blood. Never, for years. I do have quite a rare type but it seems odd given that I live in the biggest city in the UK and I've just seen an urgent call for donors. Has anyone else had this experience?