Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Turn Hot Water Tap On
Attach FGA / U-gauge to burner pressure test point
Gas On
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

During the sparking stage of the ignition sequence is there a burner pressure of at least 2mb (minimum pressure).
Note:
When "U" gauge is removed test point should be tightened and checked for gas tightness.