The Group By The Water Feature

 

I have reason to believe that this slide was taken in the grounds of Chatsworth House.  Reason - Other slides in the box look like Chatsworth, and I sort of recognise the area.

I have reason to believe that this slide was taken in July 1987.   Reason - It was written on the slide.

I have reason to believe that these people are the Norwich and District Wife-Swapping and Dogging Association.   Reason - Pure supposition.

Bonus -