The problem I forsee with a remote radar unit guiding aircraft in to Shoreham is that other aircraft around the airfield might not be using that same radar service. Shoreham has an ATZ; there is no controlled airspace around it. A remote radar unit would have no idea if potentially conflicting traffic was on frequency and would have no way (practical or legal) of ensuring they were. The aircraft being vectored would still have to be given standard separation; the only way to ensure this would be a "deconfliction service" resulting in a lot of "break-offs" from the letdown being attempted.