On top of all this there are covenants. The estate upon which I live has covenants on the deeds preventing enclosure of the front garden; the building of any form of structure whatsoever, including sheds, in the back garden; and the keeping of animals on the land.
The original purpose of these covenants was to help the builder sell the last plots, and all 3 covenants are now largely ignored. Since the original covenant was with a firm that has gone bankrupt/been wound up 25 years ago for tax purposes, I imagine the remaining beneficiaries round here are the neighbours - most of whom have already broken the terms.
But you never know. It's worth talking to your solicitor