Wall socket overheating Plug casing caught fire.

[SUNRAY]

The lights ARE on a ring circuit.

How do you know?

Have you done all of the testing of the circuit you'd need to verify that it is a ring?

I had new light fittings installed a couple of years ago. The engineer confirmed it was a ring circuit then - through each fitting is an additional live connecting it to the light in the next room. He actually muddled them at one point so that switching the light on in the bedroom actually switched the light on in the lounge. This is what I understand to be a ring circuit. He said he'd never come across it before.

No not a ring, that sounds like a totally standard installation,just like 99.9% of properties.
The symptoms of the 'error' you describe could not possibly occur if it is a ring.

 

[ban-all-sheds]

But could easily occur when you have an idiot working on the wiring, instead of someone who knows what he's doing.

"Never come across it before"? FFS.

 

[lozzy73]

But could easily occur when you have an idiot working on the wiring, instead of someone who knows what he's doing.

"Never come across it before"? FFS.

Oh, ok.