Colin
I just did the second weekend of a two-weekend foundation course run by the British Medical Acupuncure Society (BMAS). They accept people who are registered healthcare professionals as well as GP's. Could this be what you are looking for? Their website is www.medical-acupuncture.co.uk You certainly don't need to learn TCM. As to validation/certification etc you need to take it up with them but it looks possible.
Best wishes
Bill