[Rob]

It's an interesting concept. Something that actually could be quite useful for businesses. Until now you could have a second phone line ADSL enabled as a backup (despite what your ISP might say BT themselves do not offer any SLA on ADSL so if it dies, it can take a while to fix especially if noone will get off their backsides to start any testing - happenned to our ADSL a year ago for a week, ouch). But if you can't make use of that second line, except by some very primitive dual line router system that can't really share the bandwidth (one instruction down one line, second instruction down another line), it's an expensive luxury.

To be able to genuinely share the two ADSL connections, get a proper speed boost, and have some redundancy of connection. That's got to be worth considering.