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Hello, My mum has a Worcester Greenstar HE30 boiler (approx. 15 years old). Since its last service (and possibly coincidentally) it has been making a booming/banging sound randomly. This is a noise like a pocket of gas igniting and can be loud enough to make you jump. It's been impossible for...

I would like to have a photocell operating two lights independently of each other, but also have a override for manual operation for each light. I've trawled the electrical forums and taken on board expertise given and come up with this wiring diagram using a 4 gang, 2 way switch. It seems good...