My son moved into a new house over three years ago, when he moved in he tried for at least a year to find out who his supplier was but no luck-his supplier originally said they did not supply him, he was recently sent a letter from his gas supplier(YES GAS) and after a bit of arguing he found out that they can only claim back three years ,he got this down to two, (well worth you check the law on this) and hope its the same for the electricity supplier IF your case is similar to this . I THINK the term recently has or will be reduced to two years-IF THEY CANT GET THEIR ACT TOGETHER TO GET WHAT THEY ARE ENTITLED TO THEN MAKE THEM WAIT BUT CHECK ON YOUR RIGHTS