An Isolating switch (switching all Active & Neutral conductors) and located in a “readily accessible” position (within 2m of cooker and not where you have to move things out of the way to get to it).
It is OK to put a GPO in the cupboard under the appliance and to plug into the GPO. Even if there are pots & pans in the way, this is OK because the GPO need only be ‘Accessible” not ‘Readily Accessible’.
Readily accessible, lockable isolation switch adjacent to each air conditioner (do not mount on the air conditioner). No need to switch the neutral, but it is recommended for a safer installation.
Readily accessible, lockable isolation switch adjacent to the hot water system (do not mount on the hot water system). No need to switch the neutral, but it is recommended for a safer installation.