Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
G.C. Number 47 267 06
Case removal
Front Panel - Grip firmly on both sides and pull it forward away from the main boiler assembly.
Base Plate - Unscrew the four screws which secure the base plate. Note: The panels are located in keyhole slots, push panel upwards and pull away.
Combustion Chamber Outer Cover - Remove the five combustion chamber outer screws (A) and unlatch the four buckle clips and remove cover.