We're officially 230V in Britain now, but only because the powers-that-be have fiddled with the allowable tolerances, changing 240V +/-6& to 230V +10%/-6%. The bureaucratic mind at work! [Linked Image]

I expect we'll see supplies which truly are a nominal 230V as transformers are replaced, but it's likely to be a long time.

Temporary sags and brown-outs excepted, my line usually averages around 238 or 239V.