Nouseforname,
If you are talking of another country then i apologise, however from your post you seem to be talking of British Law! Ie:- "I know what you are saying about if you don't use the strip then you won't be able to prove that you used it. However low usage means that not many people will notice it. Then after 10yrs you can just try and get full planning for as many movements as practically possible. It's all about playing the game really. I have a strip at the moment in my back yard 850m by 17m enough to land a small jet. I had to get an environmental survey done which cost £12k but apart from that it's worked out pretty well. I've only got planning for 12 movements per year, but use it about 100!" All the facts in that statement relate to British Law, however if you live in another country with equally bureaucratic rule makers, then i feel sorry for you to! Also you give your Location as London and talk of a strip near London, which is why i made the assumption you were talking of a strip near London.
I will make you an offer Nouse, post the co-ordinates of your strip in another country and i will google earth it, and if there is a strip there 850m long, then i will give you a free hour flying in the Fire Engine, how's that sound? And if its 17m wide i will give you another hour!
PS Upfield Farm is appx 10nm S.E of Newport Wales