Your profile on our side is 77.4Mb, that is the only speed profile applied.
I have to say here that I agree with max - he is spot on.
I have experienced
exactly this slowdown when my profile is set to 77.4. However, I did *not* experience the slowdown when I was (for a time) allocated to the fake "unlimited" profile (the value was, IIRC, 20Mbps - and was used by the original FTTC triallists before Plusnet put in place real profiles).
It seems that the profile of 77.4 restricts throughput slightly more than it says.
What speedtester am I using that allows me to see this?
Simple - the Samknows white box. Nine tests per day, at a time when it can see no other activity going on.
When I first swapped to 80/20 speeds (early 2012), I was on the 20M profile, and the Samknows box reported speeds of 74-75Mbps for near 6 months. This stopped when Plusnet had an unfortunate week when it restricted everybody to 38Mbps; on return to "normal", the results are noticeably lower at 71-72Mbps.
Samknows stores results from 2 years ago, so I can still see the effect. Just.
I've reported it before on the forum, but never got a response.
I also saw, and reported, the same effect on the 40Mbps service (with 38.7 profile). Same result - no interest.
It is almost like staff don't want to believe it...
Of course, this question might explain why:
I have to ask, but what impact is this actually causing?
No impact whatsoever, to me. It's embarrassing even mentioning it.
But if it suggests that lower profile settings are also set slightly low, you might be having an impact to someone where it does matter.