I don't know Roger. I have an ADSL2+ line too, and I think you have to be pretty close to the exchange to see any massive increase in speed with 2+.

Line performance isn't all about speed either, stability is a large part of good performance on DSL lines. I once sat with a BT Wholesale guy who used my line at home as an example for a couple of technical points we were discussing, by changing a few settings we were able to get my line to sync at the full 8Mbps. Unfortunately it would hold sync for about 5 minutes and then drop for 5 minutes. He then showed me it took the auto systems about 30 minutes to figure out my line can handle about 6Mbps at 100% uptime, I was quite impressed to be honest. So maybe your line can't handle the ADSL2+ speeds ???

Cheers

Cris.