I have this done once a year, together with an examination and an ultrasound, and have done since I was 35-ish due to my sister having breast cancer in her 30's and also my mother's twin. It costs me a few hundred pounds but, as I suffer with health anxiety anyway, I feel it is worth it. It is also instant - mammogram looked at while you are there. Happy to send more specific details if you would like? I am in London x