As mentioned by b*cat, my line length from the cabinet is around 1100m.
The cable actually goes away from the direction of my house near the cabinet in order to reach a road crossing to cross a main road.
It also continues past my house to a joint chamber then doubles back to a pole across the road from my house before coming in overhead at the back of my house.
These 'diversions' add approximately 130m or so to what the length would have been if more direct.
When FTTC was first installed in 2011, apart from almost 11 months of unstable service due to an external line fault that took far too long to locate & repair, my connection was able to achieve & maintain sync speeds at around 30Mbps/7Mbps.
Crosstalk since then has gradually diminished sync speeds to these:-
Upstream rate = 4516 Kbps (4,5 Mbps), Downstream rate = 22399 Kbps (22.4 Mbps).
I use a Huawei HG612 modem, connected to a Huawei DSLAM & G.INP is currently ON for downstream & OFF for upstream.
My connection is very stable & general error counts also reduced significantly when G.INP was introduced.
Also see the attached screenshot showing today's BT estimated speeds.
EDIT:
FWIW, prior to having FTTC installed, I was lucky if I achieved 1 Mbps sync speed (on a good day) from my ADSL connection - around 5.3 km or so from the exchange, so having FTTC installed was a no brainer for me.