Set Appliance State:

Mains Power Off
Gas Off
Turn Hot Water Tap On
Boiler switch ON
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Boiler should start its ignition sequence when sparking ceases, the boiler should now be in a lockout state.
Press the lockout reset switch, does the lockout LED go out?