Just over a week ago I had a great trip to the New Forest from Birmingham. The car (20vt) ran perfectly apart from a minor problem. After shortish trip from our hotel to the coast, the car was parked in the sun for about 45 mins and then refused to start. Battery must be good as it turned over well, but no go! After 3 or 4 attempts in fairly short order it fired and ran perfectly for the journey home. I then used it for a couple of short trips - no problem.
Then yesterday, after a run of about 55 mins. the car was again left in the sun. Half an hour later it refused to start again. This time, after several attempts, it would not go. I left it for an hour or so and it started after turning over a few times and ran well for the journey home.
Could this be a vapour lock? If so where in the fuel system could the issue lie and what could be the best cure?
Any help appreciated.