Hi Jim & Joe
Many thanks for the quick response .... The battery is brand new, fitted some 4 weeks ago. I have had the car for some two years with no previous issues, the battery was fitted due to your comments, i.e. a failing battery creating weird electrical issues, mainly a "park brake" problem.
As far as I am aware there are no after market additions to the car, but, maybe I will have a thorough check.
Something entirely unrelated, having never spotted it before, some times when I walk in front of it, the lights will flash????
John