May as well put an update online... the cars back on the road after my breakdown. Luckily only the gasket on the inlet manifold gave in which was replaced quite cheaply. The reason it overheated in the first place was the cooling fan..it has seized. A few days in the garage and a new (uprated) fan has been fitted...and the AA are footing the bill
Also had the hinge bushed replaced whilst the clam was off to stop the drivers door closing on its own. Heatshield was also fixed again...for about 2 days. I think im gonna have to give in on this one and replace the heatshield, its been hacked and riveted back together so many times and the rattle wont go away!
And winter draws closer...another few months of misery before I can take the roof off again.