My Yaris has an intermittent fault

[Yarisprobs]

Okay so firstly I have a 2010 Yaris and it intermittently wont start after driving. It can be as little as 10 min or usually after driving 40+ min.

The car turns over but won't start and none of the dash lights turn on, but the radio and the lock/unlock function on the key still works.

It will usually start first go after waiting an hour.

I have had the spark plugs and leads replaced and still have the same problem.

Any help would be great