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There is no specific diagram for those, but it will be the same general principles, the main difference being that J and I (EV socket outlet / EV plug) don't exist as the cable is permanently attached to the controller. L/N/E/CP are just straight through from the controller to the vehicle...

Warming drawer and fan are such low power they can be disregarded. Generally such things would just plug in to whatever socket outlets you have in the kitchen. The other three are no different to a freestanding electric cooker, of the type that's been used on a 32A circuit in millions of homes...

There are 2 pins used for communications/signals. CP is used to indicate the charge current available, this can be varied at any time including while charging is taking place. The signal is a pulse-width modulated square wave. There are many pages of documentation regarding the possible...

TN-C-S is the connection at the service head. PME is what may exist within the network. Older services can still be TN-S at the service head, but that reveals nothing about what may be connected elsewhere in the network. The real question is whether the N&E are combined at some point(s)...

It's not required in a garage because those who wrote that section of BS7671 decided that the risks in a garage were lower than those outside. In some cases they could be, but certainly not in all. Garages typically have concrete floors, and if a vehicle was driven in there while it was raining...

Two choices. Cheapo affairs such as Triton for well under £100. When it breaks or inevitably is stuffed with limescale, buy a new one. Mira ATL which will be £400+ When that breaks or inevitably is stuffed with limescale, pay for repairs. Parts and repairs likely to cost more than the entire...

If people are that careless they should not be anywhere near electrical work or EICRs. When other possibilities are eliminated, all that remains is the truth.

Loose connection is most likely.

If those resistances are to be believed, then the current at 12V would only be 2 amps and 1 amp, but that's a ridiculously low 24 watts and 12 watts. Typical wiper motor would be several multiples of that. However they are probably unrelated as motors can't realistically be tested or much...

None at all. It would actually be slightly worse as you will then have an fuse in the FCU and another identical fuse in the plug. Either of which could fail if a fault occurs, adding inconvenience to whoever had to replace it. The 6A MCB does that.

They are an AI bot.

None whatsoever. It's a switch. Nothing more. They are all 100A maximum because 100A is the maximum supply you will get for a normal domestic property.

Probably someone who was convinced that socket outlets cannot be fitted to anything other than a Ring Main so they wasted their time contriving a dangerous mess instead.

If someone was to climb up there and plug in a welding set then the 6A MCB would trip. Then they would hopefully realise that it was not an appropriate location to connect high powered equipment.

A plastic box is a plastic box. It has no electrical components and therefore cannot have any current rating.

Leftovers from decades ago when 30A fuses were common and people thought it was appropriate to conceal round brown junction boxes everywhere.

Get rid of the plaster and start again.

The phone is broken. Buy a new one. Unrelated. No.

You do not need an FCU. If you want a socket there, connect a socket to the cable.

That is a 1p discount available where you lease a car from OctopusEV and also buy your electricity from Octopus Energy and have also signed up to their Intelligent Octopus Go tariff. Who installed the charge equipment and what type it is has nothing to do with it.