Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
G.C. Number 47 581 01
Case removal
Remove the 2 screws that secure the upper part of the front panel of the casing.
Carefully slide the front panel a few millimetres up towards the top of the appliance until it is free from its slot and then lift off.
Take the protective grating off the top of the boiler by removing screws.
Unscrew the 4 screws that fasten the lower grating on the casing and remove it from the slides of the casing.
Unscrew the 2 screws that fasten the lower part of the instrument panel.
Make sure the casing and screws are put to one side in a safe place.