After cleaning out a large amount of sludge from the block and fitting Ron's superbly made side plate ,four years of over heating problems for the main part have been sorted out.
Yesterday I used the car on a 20 mile jolly to the coast, in hot (for the uk) 33c heat.It cut out in a traffic jam and after driving slowly on the way home.
The problem starts when the fuel stops flowing through the glass filler to the carburettor; I lift the bonnet to let the engine cool down a bit after four or five minutes the fuel will suddenly starts to flow agin.
I wonder if this is a problem with the Stuart Vacuum tank vacuum / vent sticking when hot ?