Vintage, you're quite right of course, it depends how each ATC unit handles VFR flights , and its why I said ATC usually take VFR flights "as they come".
I finally managed to track down the ICAO document 4444 which is the definitive document on the contents of FPLs.
In the route field, it only allows, airways, significant points (published Nav points, and way points), Lat/Long and Bearing Distance. The latter are to be referred to a navigiation aid (preferrably a VOR). The sytnax is 8 or 9 characters, being a 2 or 3 letter identity, followed by 3 digits defining the magenetic bearing and 3 digits defining the distance (leading zeros to be used, where necessary).
So, no place names or VRPs - you either use Lat/Long (messy) or bearing distance for published Nav points with 2 or 3 letters identity. If you do use place names, it will depend how the specific ATC processing system treats them.
