the majority do have an NDB as the Final Approach Fix (FAF)-usually about 4.5 to 5 nm from the threshold
I forgot to mention it but of course the NDB provides the "accurate distance information" while you're on final approach.
Looking at many ILS approach charts, you'll find that somewhere between 4 and 5 nm from threshold there is an OM or a DME info or a NDB.
Anything that complies with the accuracy needed by the ICAO definition of a precision approach (I gave the reference to show it's not only a view from this side of the pond
).
There may be ILS approaches without that info on final but if there are I would guess that the DH must be higher than the usual 200ft.