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!