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Ah, now for me the fog begins to clear: Maybe there isn't a sensible answer ! This may end up filed with the "improvements" brought about by the official consumer watchdogs. They forced a change to gas and electricity billing which led to almost all suppliers charging standing (daily) fees, and then also "better/clearer" charging for 034, 084, etc. numbers - both in and of themselves made my bills higher until I found ways around the situation. Thank you EDDIE.