A couple of years ago I had a leg injury that required some regular specialist dressings by a nurse. A&E at Kings said just ring your GP and fix up a few nurse appointments. I called the DMC and they had no appointments for two weeks. So I had to go to the Lister who didn't have the correct dressings so she had to bodge it. Then I went to the Bart's walk in clinic who gave me a supply of the correct dressings to take with me. After that I just taught myself to do it.