Flooded or starved?

[frailer]

Have a 1.3 XR. Work/Co.vehicle. (Sydney, Australia).
Had the car in the driveway near the street. very hot day, Wife decided to move up drive. Engine on for a few seconds. She says herself she switched on quickly.
When I went to start it in the afternoon, wouldn't start. Cranking fine. Followed manual advice, and held foot to floor for the required time (20 secs?). Still no joy. Road service came later that night. He cranked it for longer, and got it going. he said, "You've got to listen for it". ...presumably it starting to fire.
Questions...boss thinks there is something 'not right' going on; some underlying fault.
I'm convinced it's a one-off. Guy who dropped it back to me after it getting the all-clear says that he always waits for all dash lights to appear, and wait for any that turn off as a matter of routine, to do so before cranking. Sounds like sound advice.
Anyone familiar with the EMS and troubleshooting? Would such an event show on the diagnisis when they plug in at the dealer's?
Any other thoughts welcome.