I'm subscribed to the 152Mbps service in area 21. During the day my download speed usually runs at that speed, but in evenings and at weekends (when I want to use it) it is incredibly slow - dropping to around 2Mbps down. Upload is fairly stable at around 10Mbps.
The graph below shows a couple of days of download speeds sampled every 15 mins using speedtest.net. This is a representative sample - the same thing happens every day.
Couple more bits of info. I'm using a wired connection. I've attached the downstream and upstream pages from the router's status page (though I doubt the issue is there as it works at full speed during the daytime.)
Really sorry to hear you're experiencing speed issues.
I've located your account and I can see an issue with the network in your area affecting speeds at peak times - Ref.(F003952012). Our technicians are working to get this resolved and have set a review date of 29th March.
I'm really sorry for any inconvenience this may cause.
All the best
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