But surely PPR is losing its meaning nowadays? An actual experience went something like:
"Hi! I'd like to land at you aerodrome today if that's ok"
"Sure no problem. What time are you thinking?"
"Um, about 12, 12:30"
"Great! See you then!"
<click>
".....uh...hello?..."
Sorry for not answering your question Whirly, but it seems to me that they would want to know as much about the incoming aircraft as possible, its call sign for example. How else would they know who to get mad at for landing without permission?
Imo, PPR is just ink on paper for some places..