Earth Trip keeps cutting out

[ppppenguin]

Having the fridge/freezer on its own circuit is a good idea. An RCBO is ideal for this. It's just about possible, even under 17th ed regs, to run a fridge without an RCD. The wiring routes need to carefully considered (anything buried in a wall must be more than 50mm from surface or in metal conduit) and the socket must be marked that it's for fridge only.