@HOVERCOL with full fibre services there is no way to directlu measure the speed to your hub unlike services delivered over copper so tests run on a device is all we have.. rarelybthere can be issues at Sky's end but more commonly the restriction is in the customer's home network.
The speedtests you run on your devices measure the slowest part of the link which can often be the speed of your home network especially if you use a device connected by wifi. Therefore it is more important to test using a device connected by a known fast connection which is normally a direct ethernet cable than to use a particular speed tester. The second thing you need to assure is that there are no other devices on your network using bandwidth when you are testing. Tests like Speedtest.net and Fast.com are widely used as the test servers are in the UK.
If when tested under those conditions and you still are getting results well below the speed you are buying after you have rebooted your hub then call Sky and report the issue. There have been some similar reports from users including my own connection earlier in the year. My issue was fixed by Sky's Network team but I was never told what they did. Sky will walk you through some diagnostics which have to be run before the system allows the agent to escalate the issue so it is quicker to co-operate rather than arguing.
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65inch Sky Glass, 3 Sky Streaming Pucks, Sky Ultrafast + and Sky SR213(white Wifi Max hub) main Wifi from 3 TP-Link Deco M4 units in access point mode
