A FISO service used to be provided by Signals staff. Not ATC.
The Restricted area R22 was put there to protect SAR Heli deployment. There's no tech support now, but there was when the Dauphin was stationed there. When the Unimog Fire truck & crew were removed that was the end of it. The runwat itself is ok, but the support services are not there and so it cannot be used.