Very slow fibre speeds!!

[#1]

Hi
So for the past few evenings my fibre speeds have been dropping to ridiculously low speeds of 5Mbs compared to the 40-60 Mbs that I regularly get at normal times during the day and usually the evening.have tried resetting router a couple of times but doesn’t make any difference ,and have used Ethernet directly into router but still getting same low speeds.dont know if any one could have a look at my line and whether or not this is due to conjestion in the evenings?
Thanks
Chris

[#2]

Hi Chris, 

I've just been running some tests and the diagnostics don't point towards any obvious issues. 

If you're still seeing the same problem I'd go through some troubleshooting next: https://goo.gl/Rnae7N once that's out of the way it would be best to report a fault over at http://faults.plus.net

Let us know how you get on.