The reason phone (or on line with contact details) is insisted at my local field is:-
Sorry but this is all trash.
a) PPR by radio is not always possible as there is breaks in cover.
Then fly higher. Airplanes don't fly by radio waves. Transmit above the mountain, not in the next valley.
b) Three runways sometimes all being used.
Get the info from the ATIS, or ATC or from other pilots. Look out the window.
c) The CAA want it recorded.
Get the recordings from the radio transmissions.
d) Safety info not yet in the flight guides.
NOTAM.
e) If we don't know you're coming we don't know you're missing. (Inhospitable terrain).
File a Flight Plan
f) For those who are incapable of self briefing.
Get a PPL.