Thanks SRS. Argos over here is probably as good as I will do. With elsctrical goods, changing the sign to/from dollars/pounds is often a reasonable currency conversion.

We use an oil fired (no gas here) boiler here and it does most of the job pretty well. I'ts just nice to be able to get that little bit of extra heat once in a while. So I wouldn't be running it for hours on end at a time day in day out.