I got an email today from PN saying "I have now changed the speed on your account to match the capabilities of your line", however the current speed on the member centre still shows 37 Mb. A reboot of the modem and router changed nothing. OK, I can leave it a day to see what happens, but I ran a BT speed test and to my horror it reported:
Download speed: 15.94
Upload speed: 13.44
Ping: 35.13
What's gone wrong I thought, whilst panicking.
After reverting to my laptop, directly connecting to the router with a wire, etc, re-ran the test and all was well. Well, it was back to 37/18 or there abouts.
Back to my desktops, and a bit of messing about, and low and behold it was Kaspersky Internet Security. For some reason, it makes the BT test appear much slower than the link can run. Once Kaspersky was disabled I achieved similar results on all computers. Glad that's sorted!
Now I just need to wait for the line speed to update, or get in touch with PN support again if it doesn't improve in a day or two.
Latest test: 36/19, upload seems near the limit at 19 Mbps.
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Tony