Set Appliance State:

Mains Power Off
Set Boiler Control Thermostat to MAX position
CH Demand
External control calling for heat
Gas On
WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure
Mains Power On

Observation:

Allow the fan to run.
After approximately 5 seconds does the pilot light,
followed shortly by the main burner igniting?