Again, thank you all.
I'm afraid that past experience TOTALLY mitigates against any BT connection. (if you see what I mean)
mixture - your recommended site was new to me and fascinating but too complex for a 'bear with a simple brain'
deltapapa - I had a chat with Plusnet and was impressed - a sales 'rep' who seemed to understand what I was after, didn't try a hard sell and offered advice for a cheaper package than I initially enquired about. Quite extraordinary!!
Haven't quite made up my mind yet but will be asking Orange for my MAC shortly