Sheesh, I'd love to know how the heck you manage to drive them down so low. The nearest I've gotten to that is about a quid or so for the dsl but still had to pay the full line rental & call plan amount. OR they will discount the call plan. afaik they dont/wont heavily discount the dsl aspect AND give a free call plan.
Off the top of my head the WBC FTTC port cost is about £15 pm pre VAT and nor does that include bandwidth and MSIL costs.
Surely that has got to be loss making for them, which is ironic in terms of your support requirements.
I know that most of the profit for the SP comes from Line Rental.... but even so WLR line rental inc VAT is just shy of a tenner, so what you're paying each month doesn't even cover WLR and the port cost in the cab, nvm your calls and bandwidth.
Since its taken me a while to type all this out, please can you give me some tips on what you say to consistently be able to get such good deals.... either that or I need to get you phone up for me

That reminds me I need to check my parents as Im sure thats due.