Oh dear, I don't know how your thread has been missed.
Very sorry about that. Normally someone would make an initial response within 24 hours.
As
Alec has already mentioned, due to the fact that you have an existing demarcation point, the
LJU3, it would be a chargeable service to have it replaced / upgraded to an
NTE5/A by
Openreach.
Obviously we do not suggest that you perform the task yourself but it has been know for persons to visit a certain on-line auction site and purchase an
Openreach branded
NTE5/A (also referred to as a
Linebox) -- surprisingly they are quite
easily obtained -- and with due care & attention, perform the upgrade themselves. One of the little things that might "give it away" as a non-
Openreach performed upgrade can be failing to connect the wire that is the more negative of the pair (with respect to a good earth) to the terminal marked
B and thus the other wire that is the less negative of the pair to the terminal marked
A.
Once there is an
NTE5/A fitted as the NTP at your premises, all sockets and wiring from that point "inwards" becomes your responsibility. Subsequent rationalisation of that could then produce an improvement. Certainly if a
SSFP (a Service Specific Face Plate, also known as a centralised filter) was fitted at the
NTE5/A and then the modem/router was either directly connected to the xDSL socket or from a dedicated xDSL extension socket, it would be an improvement upon your current set-up.