1stmbnothappy

I have an intermittent starting problem. The car is happy to do a cold start but after driving and leaving for an hour or so it won't start. It does turn over and cranks. I have tried the spare key, I have changed the CPS twice! Full service new plugs and filters.

I seem to be running out of options!!

Original Star diagnostics is not finding any faults.

Please can someone offer any advice or ideas of what to try next. It's cost me a fortune getting this far and I'm back to square one!!