Who was responsible for putting the stone up, anyway? The British? Germans?
I dont know for sure but probably Brits if it is in Scottland.
This from http://www.skrewdriver.net/jordan1.html
The Hess memorial stone was the idea of veteran National-Socialist Tom Graham who financed it, negotiated the landowner's permission for its erection, and who, despite being a great age, personally erected it with the help of another supporter on the exact spot where Hess landed in 1941. It was attacked and destroyed by the organiser (an Asian) of the local Anti-Nazi League, helped by other members of this vicious communistic organisation. When the police failed to prosecute these people, I pursued long and persistent efforts to persuade the Scottish legal authorities to prosecute, but they refused both to do so publicly and to allow me to do so privately.