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Just like the vast majority of the sellers/manufactures do.

I don't think anyone would be jealous of the crap I have to deal with most days.

Reverse polarity could be one. The lack of overcurrent protection on the N. The N contacts are more like a simple switch, rather than having the same breaking capacity as the L side. As already said, in most scenarios it won't make much difference.

Double pole disconnects both the live and neutral wires for full isolation. Sp+N Is not considered to be a true double pole device, as it doesn't control two separate circuits simultaneously.

That isn't 2 phases, it's two halves of the same 110V single-phase.

Typically, a 2 phase supply used a Neutral, hence you couldn't achieve complete isolation using 2 poles.

@poni said: Double pole is for two phases circuits. A DP MCB can be used on single phase and provide isolation. A DP (Double Pole) MCB on a 2-phase supply would not provide complete isolation. @nicebutdim correctly said that the difference is: SP+N lacks overcurrent protection on the neutral.

722.531.3.1 RCDs shall disconnect all live conductors. As @nicebutdim check with the manufacturer as to the requirements.

Where would the Neutral conductor terminate to give isolation ?

Dp (sp+n) rcbos are helpful where you have a N+E fault as sp ones won't clear the fault, particularly on TT earthing where an upfront rcd is being used.

It's not an improvement aesthetics wise, and certainly not an improvement as to the location of the switch regarding ingress or heat.

Personally, I would sell it and buy a decent lamp and probably a nice meal :)

What sort of earthing system have you ?

That depends on how small the cable is :) :)

Maybe I've word blindness or something, but I can't see a Hob, oven, or immersion are you on gas, oil?

Yes, you are correct. But again, posting a pic of the cut-out/main fuse and CU would be helpful.

Like already said a picture of the Cu would be a help. I would think that the best way is to have a Board change to something like a Fusebox spd/rcbo board. The cost of upgrading that CU + eicr maybe more than a new CU, and you will end up still having a plastic one.

The Op did say that the board was populated with type AC mcbs. The Op in fairness did say he was getting an Electrician in he also said "my apologies if any of the above ramblings is talking tosh (I realise "a little knowledge is a dangerous thing").

That type of plug and socket isn't designed to handle that sort of current for long periods of time. Mode 2 would probably be ok. No No

722.55.101.0.201.1 Each AC charging point shall incorporate: (i) one socket-outlet complying with BS 1363-2 marked ‘EV’.