Presumably you are ordering BT FTTP alongside your existing broadband supplied by someone else , the DSL checker shows KCI2 , and UG congested duct , this should mean once your order is taken , it’s a two stage install , the congested duct may need work , it doesn’t necessarily mean it’s blocked , just that at survey it couldn’t be verified as serviceable.
You shouldn’t be given a contractual date until a cable has been provided from the CBT ( in a joint box somewhere close by ) to your house wall, as obviously it’s unknown what may be needed to get a cable to your property ( and the costs involved ) but the first visit should be arranged to ascertain what’s needed ( if anything )
If you haven’t been given an initial date , and have never seen the 1st stage engineer , you need to ask BT why , if you have had an initial visit , ( possibly confirming the duct as blocked ) it would need work, if the work needed was on your property , then you would have to agree to excavation etc , but you should be kept updated.
Is your property relatively standard ?, there was a post on another forum , not the same issue as you, and not using BT , but in that case , the CBT was in a public area, but the customers property was some considerable distance away ,( very long driveway, hundreds of metres ) the excavation required was extensive to get the cable from the CBT to the property ( all within the customer land ) and they were expected to contribute £4K to £8k towards the costs…if your situation is similar it could be there are going to be excess costs , and that in part is responsible for the delay
