I have been a member of the Medical Defence Shield for several years. They provide Medical Defence & Employment Support Under One Roof (mdsuk.org). I have directly benefited from them in my previous jobs, the old CESR curriculum period extension and employment-related matters. They provided me with round-the-clock help and support in my times of need, and I highly recommend them. I have no financial incentives in this regard and encourage you to find out more about the MDS from other sources and join them as your defence union if you are interested.