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Thanks all for these replies. Perhaps I will contact the DNO as suggested. Meanwhile, does anyone know about the merits of an RCBO breaker (such as this) for this case?

Hi folks, I am at my wits end with constantly replacing bulbs in my house. The reason they blow so quickly is, I think, due to voltage fluctuations. I suspect all circuits are affected, but I notice it in the lights as they all flicker (together) from time to time (every day) throughout the...