With the popularity of smallholding, down to TV programmes and the like, there is a huge demand for allotments and small plots of land. I thought the country was being encouraged to be a little more self sufficient, and grow their own food? Schemes like this should surely be encouraged - not that it should be allowed all over the place. And I would like to see some restrictions as to how the plots are kept - I can just imagine some people would create an eyesore.
I read not long ago that local councils were asking farmers to rent pieces of land for people to grow food on - I assume they would agree to a change of use for these schemes.
As to the planning - the place I mentioned has got planning.The way round it is to have mobile wooden sheds, like a mobile animal shelter that can be moved. As I understand it, a wooden building is only classed as temporary anyway.
Having said that, I do wonder if the planning permission is for say 3 years, and then you would have to re apply for lawful use (which they can, and do turn down sometimes!)