OK, I couldn't wait and made a start tonight. The bezel was stuck and full of
**** crud. I took it off with my trusty bezel removal tool** and proceeded to clean the crud off the bezel and case with my son's electric tooth brush. Better than it was and I am happy I made a start.
It has lost it's click as I think the BB has gone. (can this be replaced?)
** You dont want to know my tool list, but the work. Just dont ask me to work on youe Rolex