Secret garden entrance

At the back of what is now Blaise Museum, through the Rose Garden, there is the entrance to the wash house / back of the Orangerie / the pump house / and this back entrance to the Dairy cottage gardens containing the open air theatre. This is all hidden away from the general public but when I went to dead head and weed the roses I found there had been intruders who had left all the premises wide open despite all the signs saying NO ENTRY ASBESTOS!