Request DLM Reset
Hi Mat, having spoken with the engineer a couple of times today (I believe you were there, at least when the engineer rang the first time I think) it looks like the expectations of your line we're seeing only goes up to the DP and in the final 40 metres or so of the line that's partially aluminium to your property you're losing a bit more speed.
The engineer reckons that your line achieving a speed of about 64mbps is normal with an absolute minimum of 55mbps. They've checked other lines nearby connected to the same DP and they're getting around the same too.
The engineer also went through the recent speed history of your line and while we can see almost 4 few years ago you got near 80mbps, it looks like you've been getting around 65mbps since March 2017.
I've poked the speed profile on your account up to 64mbps to match the current sync rate you're getting, it was set a tad low at 59mbps. I'm confident that both we and the engineers have done all that's possible to try to improve your speed further. If you've got anything to add or need help with anything else, feel free to let me know. 
Hi Mat, thanks for the post back.
Yeah I think the problem is that none of the engineer's testing identified a fault and what errors they did detect were within tolerance, so they'd be looking for a needle in a haystack. Unless tests showed a fault at the cabinet they likely wouldn't be able to get authorisation from DCoE(Diagnostics Centre of Excellence) to move your line on to a different port.
A drop in the SNRM target I'd expect would indicate there's less noise, because you'd generally see an increase in the SNRM if there is noise as the DLM software would be trying to combat the noise.
I agree though that the 4dB target is artificially boosting your speed and without it you'd likely see less, but from what the engineer has said the expectations of your line we're seeing are a bit optimistic that it should realistically be between 55mbps and 64mbps, so even with a 'normal' 6dB target you'd still fall right within the engineers expectations.
It also didn't help that from the engineer's NATO test, it seems everybody else nearby is also getting a similar speed. The engineer mentioned that his patch manager (Bit like a team manager) was involved in this so it's been to the top.
Unless I'm reading your router stats wrong, looking at them they're showing your router is in sync at 68.1mbps now with your previous speed being at 68.5mbps and the max attainable at 71mbps though?
The workplace(WP) profile should (via automated 'delta report' speed updates) always match the bRAS/IP profile rate of the line that's 90-96% of the sync speed, but the updates can be a bit slow to come through, restricting your download speed if it's set too low, and isn't something we can 'turn off' unless we remove your static IP.
This profile is basically a by-product of traffic management from long ago when all our connections were routed through certain equipment, which only connections with static IPs are now routed through due to how we assign static IPs out still. (We don't have traffic management anymore though, we switched that part off in 2017).
If you don't need and aren't too attached to the static, I can remove this so there won't be anything potentially restricting your speeds from our own side, you'd then get the full speed of the line pretty much instantly whenever the line rate changes. Otherwise we're happy to keep nudging it to the right place if/when needed.
Yup, sorry for the delay. Consider it bumped to 68.2mbps (over your sync rate I'm seeing at 68.1mbps). I'd recommend disconnecting and reconnecting your connection from within your router settings for the new profile to take effect.