Does it look like this,
That's a v2.
What you'll find is that out at the fringes, everything has to be spot-on with your setup to eke out every last Kb, so,
Remove all extension wiring.
Disconnect Sky boxes, oil tank, gas tank or alarm diallers from the line. (Note, diallers are often hard-wired to the BT side of the wiring. Naughty.)
TEST that all the extensions are dead once you remove the front part of the NTE to get at the test socket.
Use a good quality phone cable, uncoiled and away from the mains adapters, and as short as possible (more to avoid people coiling it up tidily, the actual length makes little difference - how many Km of cable are there to the exchange? The difference between a 1m and 2m cable is, er, slight).
Reconnect at lunchtime.
A filtered faceplate is near-essential at your distance. The Openreach branded ones are not expensive, the Clarity brand one is the same but allows you to run ADSL-only extension cabling if you wish to.
I would buy a 2700 and try it too - they can make a surprising difference.