We had a video recorder (still do) that got its time from the teletext signal on the video feed. It worked great until we acquired a French housemate - she often watched the French station TV5 on our cable TV feed, and it's simply re-broadcast in the original timezone (CET, I think) an hour out from the UK point of view. So often, we ended up recording something an hour earlier than we wanted.

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Toby Speight - 040103385