I'm sorry to say that I have absolutely no connection with Brigitte Riley whatsoever.
However, I do have a penchant for her beautifully designed plasters; and I usually need several each day.
When I did my Foundation Course, I had a lecturer called Dave 'makes your eyes go funny' Mills (who was younger than me), who had worked on her paintings for a small sum. He was at Chelsea at the time, and she gave him a few shillings in exchange for his eyesight. She was no fool; she got others to actually paint her work.
I still have a few of Dave's works, but they'll never reach the dizzy prices of Ms Riley's paintings; which he probably painted anyway!