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Wouldn't a disconnected neutral wire show up as being live anyway?

Rub it down, and paint it white.

Have you tried leaving a damp cloth on an area?

I was looking at some old plastic MK consumer units I fitted getting on for 20 years ago (it seems like only yesterday) and marvelling at how discoloured and shabby the look now.

Probably due to no smokers perhaps - have sometimes just tried to change the head, but the yellow bases looked so awful I couldn't leave it like that.

If you've ever had a terminal screw that doesn't tighten, or you've broken one by accident...

The old bases always go yellow - you can always tell if you don't change the bases.

Which rooms have the battery only rf detectors? Has a bungalow extension been added recently? Trying to figure out why the mains ones have become redundant - especially because it's usually easy to add more mains detectors in a bungalow.

Is this just not conventional conduit wiring, with a neutral in, and neutral out, and a switched live? Can you see another continuous red wire simply running from one conduit to another conduit in the round circular ceiling box?

That's a hell of a lot damage. Being a dot and dab wall, a lot of the cable could have been fished behind the board, and chased only where a dot is. Still, not my problem.

Another vote for a different insulation filling.

I don't see any need to label unused cores that have been terminated in connector blocks. If there is only one wire in the connector block, it's fairly obvious it's spare - or at least, 'not doing anything'.

Personally, I put unused cores into a connector block or wago at each end. I prefer not to connect them to the earth terminal. Reason being, I don't feel it's technically correct to connect unused wires to used wires. We see it on this forum - a core connected to the earths - all of a sudden...

You would be more likely to use a smaller MCB, but can still use the larger cable. What kind of things are you intending to run in the garage? It would be a better design to fit a standalone switch fuse unit in the house, done by splitting the tails with a Henley or ISCO block, assuming the...

Can you send photos please?

You can really only go by the spots manufacturers instructions, these normally include minimum measurements.

The CORRECT way would be to use the joist formula on every joist, regardless of how their lengths differ.

Probably on a 6amp lighting circuit - but won't do any harm plugging an air freshener into it. Don't let anyone start plugging heaters or portable welders into it. There is an outgoing cable as well as an incoming cable. If you are certain the switched fused connection unit doesn't serve...

Bare plaster has to be sealed with a mist coat to prevent paint from bubbling up. PVA splashes, typically found on new plaster, can cause paint to bubble up. Is it original plaster, or the original 1900s plaster? How 'old' did the old paint that you painted over look? Have your walls been...

Why do we need to know how many detectors are there?