Scenario - a kitchen fitted with a traditional leccy cooker (combined hob an oven). Where EXACTLY is the interface between appliance and fixed wiring? If it's the isolator on the wall am I allowed under Part P to remove the cover from this switch to disconnect my appliance? Further, to get the cable out I may have to loosen the switch from the wall... It could be argued that ANY electrical work on the cooker, such as replacing a simmerstat or whatever, comes under Part P. :-(
As it happens, the cooker's working fine, just the thought crossed my mind.