Although I think what your saying is basically right, about being allowed to fly off your own land, theres a thing called the 30 day rule, which I think says that if you use land for a particular purpose (e.g. flying) for more than 30 days a year this will constituute change of use of the land and hence require planning consent.
A lot of farm strips operate on this rule, and a lot of their neighbours are chalking up the tally.
I guess any sort of commercial operation would have to get consent.
Good luck, and post again if you need letters of support.