Dishwasher Tripping Sockets

If you’re 100% sure it’s the dishwasher then you need a domestic appliance repair company.

Probably a water leak inside somewhere. Don't bother getting someone out to look at it - they'll charge you 60 quid and tell you that the part is unserviceable and need to be replaced - this is probably the motor/pump assembly which is pretty much a sealed unit nowadays - which will not be financially viable. Just buy a new one really, unless you're handy and don't mind having a go yourself.

Let us know how that goes; I'm in agreement with @T-Maxx that it's usually a fruitless exercise getting somebody out if the appliance is more than around 6 years old.

Any update?

Generally speaking there are only two components that should cause it to trip the rcd , the circulation pump and the heating element, all other components double insulated, very rarely where the three core lead terminates at the mains filter it will short but usually you will hear a loud bang

I have worked on them regularly for over 4 decades and never come across where the mains lead has melted from touching the rear of the cabinet but maybe you have found otherwise

I’ve also come across this once previously

I have looked through the electricians forum you have listed but it refers to an integrated dishwasher, this was bound to happen as all integrated dishwashers should be installed with plumbing and electrics offset, so the fitter of the dw forced the machine back up against the plug top/ socket when fitting .I agree with you fully as regards the correct procedure for the wiring. The photo of the plugtop with the melted sound deadening material I would think came from a dishwasher rather than a washer

It still could be the heater element all the same - they can direct-short L to N and pop the breaker.