I got the tool to open up the box where the wiring comes into the house. It is twisted pairs. It comes 200m from our gate to our shed (where the builder lived when building the house in 2020). It is then joined straight (the shed wiring is no longer connected) to another 2 x twisted pair carrying on another 50m to the house where the Master splitter takes one pair for VDSL which is then split to go directly to the two filtered jacks in the house by the look of it
Is there a better way for it to be connected up?
Also, in recent days the speed via our DSL-AC68U has got terribly slow (down to 14 s, 0.5 up) and the latency figures have gone through the roof in tests (5-700ms unloaded, 800ms-1s loaded). Is there a normal culprit when latency shoots up like that?