Hi,
Prior to my 70th birthday, I was told not to drive due to them drilling a hole in my head. Eventually they relented, and gave me my licence back.
Due to being over 70, I lost my MEDIUM vehicle licence, groups C and D, and trailers to go with them. I supose I could have paid for a medical and kept them.
But I kept my B+E, which means that I can DRIVE up to 3500kg MGW, and TOW just about anything I'm ever likely to want to .... thats 3500kg on overrun brakes.
I also kept all the "make-weight" groups, including moped, and I now understand that I do not NEED to pass a CBT before I can ride a moped, but they suggest that I do.
I suggest that you do not release your licence to DVLA without taking a photocopy. And if you have a bike licence, consider sending them