What licence do I need to drive an Aixam or Microcar?

What licence do I need to drive an Aixam or Microcar? I was told I need a provisional licence and a CBT. And where can I find one?

Can I apply to get back categories on my driving licence that I lost?

When renewing my driving licence at 70, I didn't apply to retain the right to continue to drive vehicles up to 7000kg. However, having enjoyed a motorhome for the last two years, I would like to be able...