If you have a BT line, have you upgraded to "fibre to the Cabinet" ?
BT are rapidly putting a fibre optic cable to most new green cabinets, usually situated very close to the old one. This new one is easy to identify....it will have louvres on it and a yellow sticker.
Just to explain further......from your house to the old cabinet, then connection will still be the copper, or aluminium "tail" but from the new cabinet, your line is then taken by fibre optic.
BT won't upgrade you automatically, but they probably should have asked you by now if you would like to upgrade.
Even if you don't have a BT phone line, the actual line is still provided by BT, via its subsidiary, Openreach.
If you upgrade, then you should see a dramatic improvement in speed....I am getting about 50 mega pixies, which is more than adequate !
Please come back if there is anynore info you need, as I am always happy to help !