We don't know it is still 40Mbps, as it could have been set correctly since initial setup.
The theory, which I've advanced a few times and appears to be correct, stems from Plusnet Digital Care reps statements at least twice, when we have seen the opposite effect. Low speeds for no apparent reason when both the IP Profile and Current line speed appear correct, following an earlier low sync
. (Possibly the Current line speed being low then set higher by the reps).
There is some test they ran that detected "an imbalance in their supplier's system". It seems that the operative IP Profile is held somewhere else and isn't the same database as the one that is reported by the BTW speed test. In other words the reported one is also a copy of the operative one, and can also fail to be updated like the Current line speed.
My broadband basic info/help site - www.robertos.me.uk
| Domains,site and mail hosting - Tsohost
Connection - Plusnet
UnLim Fibre (FTTC). Sync ~ 56.6/14.1Mbps @ 600m. - BQM
"Angels can fly because they can take themselves lightly."
- G K Chesterton.