Phrase that is probably more correct is that you used to be connected to cabinet 5, but that cabinet now appears redundant for all the old premises on it.
Cabinet 9 seems to be the new one, at an educated guess an all in one unit located at
https://www.google.co.uk/maps/@54.3259653,-5.7979711...
As for where the redundant cabinet 5 was no idea, I had made a wild guess previously that was reasonable for ADSL estimates and that is around another kilometre away hence the infill cabinet, by putting it where I think it is they are delivering superfast speeds to almost all the premises it serves, if done at the old location it would have been of little benefit to many.
Its so new that not seen any speed tests or indications before your post that this cabinet existed.
Likely problem you have is that wiring in the new cabinet needs fixing, so engineers attending your home is probably of little use, it needs them to look at the cabinet, and if you are the first cabinet it may be there are some snags that need resolving.
Based on where I think cabinet is and your postcode speeds in the 24 to 30 Mbps region seem reasonable.