Hi Jamie, Could you confirm if the engine is running normally as far as you can tell? Did you get zero fault codes after using a cheapie OBDII scanner or via Vauxhall OP-COM software?
Fault could possibly be related to the MAF sensor or boost pressure sensor, but a OP-COM scan would throw these up.
The hack for resetting service and oil lights is as follows:
With ignition off,
put accelerator to the floor,
then turn ignition on,
still holding accelerator pedal down, pump brake to the floor and release 3 times.
release throttle pedal, wait 10 seconds then switch ignition off.