Spookily just opened the copy of Aircraft Owner and Pilot (AOPA Magazine) that arrived today and there is an article "how to get a drone licence". Could be worth reading if you can get a copy.
Some of the costs mentioned include initial application £750, and same for the test. Also mentions aerial work permission sheet at £400.
Hopefully fees will be prohibitive enough to deter the irresponsible. Not that I only have self - preservation in mind