Problems hot starting

[mel]

Has anyone else ever come across a problem where after a hard run for a fair time (say a couple of hundred motorway speed miles) if they switch off but then try to restart bugger all happens no click no nothing. If I then leave the car for half an hour or pop the bonnet to let it cool quicker every thing is back to normal and tickerdy boo.

Initial suspicions are that my starter motor is on its way out and has been "cooked" by the under bonnet temps!