Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Gas On

Observation:

Carry out pilot ignition procedure.
Depress grey gas control knob on the gas valve and keep it depressed.
Repeatedly press the piezo spark igniter, while observing the pilot burner (pilot gas should ignite).
Continue to depress gas control for 20-30 seconds after pilot has lit, release gas control knob, pilot should remain alight.
Turn gas control knob 1/4 of a turn to the left (in direction of arrow), pilot should extinguish.
Note:
To view sparking effectively it may be necessary to remove inner panel.