Gareth: you seem to have missed the point entirely. You are repeating 2/. SWEB, the South Wales Electricity Board, at great expense, altered thier billing system to send out accounts in Welsh. So far 7 people out of 2 million have requested bills in Welsh.
As I pointed out SWEB(which does not stand For South Wales Electricity Board) do Not cover Wales, that is done by SWALEC I am surprised that an English company supplying English customers has had as many as 7 requests. The Welsh supplier (SWALEC) automatically bills bi-lingually!

Nigel