http://www.archerfieldhouse.com/

I would also expect the relevant government agency (possibly Scottish National Heritage) to take a rather dim view of anyone breaking the conditions of planning permission.

Edit: I'd expect the people who buy houses directly from the developer to be told about this. However, I can imagine years from now someone buying one of the houses overlooking the beach (NB they are lovely houses) and getting a nasty surprise when they ask about where the gate is in the fence.