Finally my original battery of 9 1/2 years finally died
got the RAC out, been a member for years but hardly used them, tested the battery got a dead cell, to save the hassle of running round to find a new one then disposing of the old one, they fitted a RAC (exide) branded one with 5 year guarantee, did cost £108.99 inc fitting, yes i could have got one cheaper but needed the car that day
The RAC man was very surprised it lasted this long as i use the Z almost every day.