Well after some skulking around the forum looking for advice prior to purchase (thank you for all the great advice) I took the plunge and bought a '65 plate ND 2.0 Sport with 13000 miles last week from a main dealer.
My last two cars were an M3 then a TTRS and I have to admit I have been wasting my money ! Should have bought the MX5 years ago but you live and learn. So much bang for your buck in terms of enjoyment.
I am lucky enough to live in a part of the country with wonderful driving roads and the pleasure gained from placing the car accurately, in the correct gear, and not at silly speed is thrilling.
Although the car is one owner low mileage I think it has done a lot of very short journeys judging by scuffs on the sill cap and light scratching behind the door handle.
Plans are just to return it to as good a condition as possible and enjoy.
Thank you all again for what I have learnt and will continue to learn from this forum.