Regarding the former guard house: we didn't notice any signs when we visited last week. Unfortunately, the attachments only show three sides of the house, the remaining side faces the road and would be where any sign would likely be displayed. The guide did tell us that elderly people had lived in the house for many years, but that now it is obviously derelict. Sadly, no money is currently available to renovate the property either, hence the condition seen in the images.
p.s. Thanks for your kind words Martin.