At the turn of the year I summited a variation to my local FLO asking for a .223 for target use and at the same time to allow me to use my .22 rimfire(s) over a specified piece of land. Twixt the submission and the anticipated grant I did a thorough survey of the land in question and compiled a set of notes etc.
After about six weeks I took a call from the FEO asking to visit to discuss the variation. During the visit the .223 for target was a formality, the rimfire(s) were not quite so straightforward. I was asked to specify which rimfire rifle I wished to use and therefore nominate which I did. This came as a surprise as I was expecting to be able to use any of all four, not so.
The FEO asked a number of safe shooting questions and had a look at the land, on his own, then after a week or so my licence arrived.
So what do I have? All my firearms are "conditioned" for target use, the specified rimfire above I can shoot over any land where I have permission and sufficient insurance, that's to say I make the call over suitability and safety. My certificate, I believe, is a "conditioned for target" one with an "open" facility for a "specified" firearm.
I would add though that nominating an additional rimfire to my "open" scenario would not be a problem, (FEO advised this), I just need to give good reason such as a semi auto being useful at times or WMR being more effective.
I've just been granted a .243, the phone call from the FEO was interesting but that's another story. I believe that my FLO has an incremental approach to these things, show some experience, put in the time, apply common sense and you will be rewarded.