Apologies for the confusion - I'm probably not using the correct terminology.

When I turn the key, the car tries to start (i.e. you can hear the starter motor) but it doesn't sound to me like the engine is turning over (i.e. it's not a case of the car "almost" starting). The plugs are sparking however.

Also:
- The engine warning light is on
- The coil pack has been replaced
- There is fuel going to the injectors
- The battery is fine (I've connected it to a battery pack)

I'll try plugging out the CHT sensor and turning the ignition and see what happens.

I'll also open the oil cap and see if the cams are moving when trying to start it

Thanks again for your help