Intermittent starting
 

Car Audi A3has started with a fault where it won’t start and then will start often 20 minutes or so.
Went to the garage Saturday where the car broke down again and there was no sound to the fuel pump upon crank. The engine will turn over.
He has started it today and it starts every time so he is doing further investigation but is a bit lost. Any ideas?
car has just been fully serviced but did this a couple of times before hand. No codes or engine management light and nothing showing on scan