[Arran]

There is another trick to powering British and European 205-240 volt only sets that a retired TV repairman I know used to use. He would take a pair of normal AC mains transformers and hook up the primaries in series aiding, ignoring the secondary side, and connect the 120 volt input across the primary of the first transformer only. Then he would connect the line input of the 240 volt across the primaries of both the first and second transformer that would of course be connected in series aiding. It's a way of making a 120-240 volt autotransformer out of junkbox parts.
Regards
Arran