This is Kerstin Rodgers' photo, taken at Vauxhall City Farm and published in the Record Mirror in 1982.
About four years later I went back with a group of kids (I was working as a youth worker at the time) and picked up another hen. City kids- they refused to sit next to me, or anywhere near me, on the bus on the way back, because they thought it was so disgusting to touch a hen.
The horse clearly thought that she was the star of the show.
Kerstin has a food blog at marmitelover.blogspot.com