I have owned the house for 7 years and the hedge was at least 20ft high when I bought it. I suppose it will have grown a few more feet since then. I am also contemplating planting another hedge in a place where the development would be particularly visible, in the hope that it will grow high enough before any development takes place so as to screen the site from view. As yet, we believe that the development is some way off as no planning application has yet been made.
If someone moves to where the hedge is and it was like that when they came, they would be hard pressed to take any action.
This is because they are aware of it before they move in.
If it would have been the case you had planted after, that would be different./
But based on the fact you would have already had it there, they know about it then you do not need to worry.
You can not stop someone taking legal action but based on the fact it was pre-existing I do not think the claim would be successful.
Can I clarify anything for you about this today please?