Evening slowdowns on fibre?

Has anyone else noticed slowdowns in the evening? I'm connected to the Brackley exchange and my evening speed test now typically looks like this:

http://www.thinkbroadband.com/speedtest/results.html...

As opposed to this from a month ago:

http://www.thinkbroadband.com/speedtest/results.html...

and this morning is good:

http://www.thinkbroadband.com/speedtest/results.html...

Note that all tests are performed using an Ethernet connection.
I'm connected via pcl-bng04.

Edited by Andrue (Mon 12-Jan-15 06:29:01)

Now added a post to the thread on the official forums.

http://community.plus.net/forum/index.php/topic,1355...

Edited by Andrue (Mon 12-Jan-15 09:12:20)

I've added a couple of SamKnows downstream plots. I'm not seeing any severe degradation but there is a change in 2015 for sure.

http://oi61.tinypic.com/2pts0sp.jpg

http://oi58.tinypic.com/52yntj.jpg

Do fibre connections not suffer from congestion?

IME not nearly as badly as cable can....

In reply to a post by broadband66:

Do fibre connections not suffer from congestion?

Certainly they can but it's generally ISP related and as Kwikbreaks has noted that wasn't the case until this year with Plusnet.

In reply to a post by broadband66:

Do fibre connections not suffer from congestion?

Yep - enjoying my 2nd bout of it since last April right now.

Shows far more on FTTx connections than ADSL for obvious reasons.

Edited by deleted (Mon 12-Jan-15 21:16:47)

my throughput seems to drop to around adsl2+ levels in the evening every evening since the 5th when i got connected (and then weekend...damned weekends...)

This also completely breaks plusnet's user side traffic management system, because IP profiles are now set higher than achievable throughput.

Also my samknows was avg 64.65 in dec 2014
This month it is avg 53.28.