Used these guys years ago for bonded ADSL and they were awesome, can't rate them high enough.

To any reasonably well-paid tech professional saving £30/month by going with one of the 'Big Four' ISPs: Buy cheap beef, get horse-meat.

Also ... IPv6 just works, and I have a /48 assignment.

On a 5Mbps line, our average monthly usage was about 300G/month, according to router statistics.

Now that we're on BT FTTC at 76Mbps (rate to nearest speedtest.net when there's no contention), I wouldn't like to guess the usage, but I'd estimate over 1TB a month at least. The BT provided router resets its count every 30 minutes or so, and I've not yet put my own routing box in the middle, so I don't know exactly.

Both my GF and I stream a lot of HD video, and I mirror a number of repositories every week. That video is a lot more HD now, and there's far less need to ever turn it off, since it doesn't significantly affect other users.

A more feasible approach would be to combine A&A with BT, and switch depending on reliability vs bulk requirements, but that would require a level of systems administration I'd want to be compensated for.