Interesting point raised about "circling and IFR cancellation."
In the USA, if you are performing an IFR approach where the ceiling and/or visibility are below basic VFR minimums, and the airspace around the airfield is controlled (class D/E for example)....IF the pilot cancels IFR before landing, he would then be operating in controlled airapace below basic VFR minimums, without an IFR clearance.
NOT good, if (for example) an FAA Inspector should be watching/listening
