If you do a route brief or Aerodrome brief that included Church Fenton, you would find it in Nav Warnings as well as in the FIR Brief.
What about if you did A to B (which went close to CF) but did not specifically put CF in the brief, and then did say 20nm route width. Would it show then?
I often only put in the departure and destination and a wide corridor if it is reasonably straight track and use that for my brief.