Cyber-pigs

I spotted this artwork in a telephone box at the side of the road on the way to Frensham Ponds. I stopped the car and got out to see what on earth was going on. There was an explanatory board nearby (see extra). I have see many things in telephone boxes - libraries and book exchanges, food for sale with honesty boxes and a couple housing defibrillators - but never a display of cyber-pigs. It was difficult to get a good photograph but the board shows what the beasts look like. The box was locked, presumably in case anyone would wish to steal the objects...