I notice that there is now a section on the DSL checker at dslchecker.bt.com that reports on the premises situation of the line. (I'm sure it has been there for some time, but I have only just noticed it). It contains the following entries:
Bridge tap
VRI
NTEFaceplate
Last test date
I know what a bridge tap is, what I don't know is what it means if there is a "U" against bridge tap. I would guess it means "unknown", since other lines I have tested have an N for the bridge tap info, which presumably means "no". VRI is apparently Voice ReInjection, and NTEFaceplate is I'm assuming what it says, although the line was installed afresh just over 2 years ago with the then-current NTE5 so I'm not sure why it says "N" for my line.
Can anyone shed any light on what "U" means for the bridge tap bit?