Hi Halas,
the ADF's were superfluous except to "pretty-up" the ND with some blue arrows that funnily enough, lined up with the pink line on the outbound and inbound tracks!
The ADFs were certainly
not superfluous if you were conducting the
NDB Approach. However, if you were conducting the RNAV approach - then they were superfluous.
Which one were you doing?
It's explained here:
http://ww1.jeppesen.com/download/aopa/apr00aopa.pdf e.g. Manchester RW23L has an RNAV Approach, and a VOR Approach. Both have exactly the same track.