I have recently had a new broadband connection. Logging onto router I can see I am using ADSL modulation G.992.1(DMT). I've checked and my exchange offers ADSL2. What if the best way to request the upgrade from BT?
I assume that you have moved house since this post?
If not, you are unlikely to see much improvement in speed.
post router stats and results from dslchecker and mods will probably be able to help