The airfield in question does have an ATZ and is licensed. It has at least 3 clubs/schools that i know of. I have used this airfield(and many others) on numerous occasions for "on the hoof" training scenarios including PFL's(after checking with the FISO's that i won't upset their traffic of course), unplanned diversions, low level bad wx precautionary landing type diverts and have not been charged unless we've actually landed.
I have opened a dialogue with the management but as yet have no satisfactory conclusion. If this remains the case then i shall name and shame; not because i enjoy slinging mud around but if only to avert what may become a common practice.