In reply to a post by steveyruss:

I don't like paying out monthly fees for a supposedly 20mb line

You don't have a 20 Meg line but an "up to" 20 Meg line, within which 20 Kps is possible. Speed is affected by line length and state of your house wiring. Looks like you are losing out to both and will not get any better at Sky until you fix the latter.

Post your current router stats and we may be able to advise further.

For some moves to sky you do need a MAC, for some you don't.
So unless someone has exact details of your account from Sky in front of them they cannot answer this.

Sky where possible uses full LLU now, so probability is the lack of MAC will not cause any days. You really should phone Sky to confirm that they will be FULL LLU'ing your line, then you can understand the implications that this causes.