Hello all,
Many thanks for all the reply's, problem now solved. It was indeed the battery, coupled with jumper leads that were too thin so not getting max assistance through them led me down the garden path.
Contacted the supplying dealer, new battery supplied absolutely no quibble, fitted it today and all action again. Cobwebs blown out on the A 14.
Some good info on here will keep it all in mind for next time. 40 years of Plus 8s tells me there "will be a next time".
Tom.