Originally Posted by IO540
Why not?
Discuss
Probably because an NDB approach is not designed to help a pilot to find the airport.
An NDB approach exists to provide a non-precision approach (i.e. with no glidepath information) to a specified minimum descent height/altitude above a runway, either at or before the missed approach point (MAP), at which point if there is no visual contact with the runway, the pilot must carry out a missed approach.
All the above is laid out in promulgated information. None of this equates to a pilot stumbling around at low level in IMC with temperatures below freezing without a radalt or radar coverage hoping he can find a runway somewhere in the murk, whilst talking to a mate on his mobile.
Incidentally, I hope you saw that the CAA are conducting tests on GPS interference/jamming, and I am sure you will be keen to read the results at your earliest opportunity.