Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Turn Hot Water Tap On
Boiler Switch in ON position
Central Heating switch in OFF (central) position
Slacken water pump manual restart nut and take precautions to safely contain any water that may be released
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

After approximately 6 seconds from main burner ignition verify that the pump is running.
Note:
Do not take vibration as an indication that the pump is running.