How would I do that then? Would I need to call EE?

Error rates may be slightly high.

Rebooting, if you mean switching OFF/ON, is good for this purpose, as it zeroises error counts so they can be analysed easily.

Do what? The DLM runs all the time automatically. Generally the only thing EE can constrain is the min NM, but I don't think they are doing so here.

You have a long line and are getting the correct speeds for it. So EE will say it is running as expected. Did EE give you a higher estimate when you signed up? It is possible they did as that BT Checker is overestimating your line.

Yeah, they said what I'd get on the BT checker.

Do you know then whether the speed limits will lift immediately after 11:30pm?

Sorry, don't use P2P/ Torrents.