I’d practice doing both methods (global and individual) and do the one you feel most comfortable with as on the day you need to show that you’re confident. So I disconnected the carbon, luminaire, rcbo (neutral and earth fly leads) and ensured that the spur was off for the heating system. The carbon and luminaire they give you push in connectors so easy to just pull out for testing purposes. For the motor, I tested up to the DOL (top of contactor) and then from the bottom of the contactor to the motor. They don’t give you a motor just a blank box with points to test on so no worries there.
I’m happy to do either IR test, I know the procedures for each test, it’s just I wasn’t sure what to disconnect during this process and particularly the motor circuit. That is very helpful, thank you Adam.