Thank's DC
Yes it's a late 1989 3.5 EFI with some parts used from the 1990 build so it confuses LR parts when I say no it's not that one.
I think the last owner had a repair only if required approach, so regular services have not been carried out fully. Plenty of electrical faults when I first got it, most have now been sorted and I am down to this starting problem. Good idea to change the hoses, I think she is overdue for a bit of TLC and have the oil and filter ready as soon as this problem is sorted.
Cheers Fred