I must agree. Someone, somewhere must have plotted the references on a map in order to obtain the Lat/Long in the first place..... just print the map! (like they do on Skydemon. Excellent planning tool.)
While we are on the subject, what's going on at Wittering?
If you read the notam for the airfield it isn't clear if it is active or not.
And there are
2 frequencies to call if gliding is taking place. Can't they just agree on one, in the interest of flight safety? Can't be difficult.