received anonymously:

"While zippos circus were holding shows in Richmond, London we visited their site one morning.
Spray paint was used to let everyone know who had been there and why. Animal abusers was spray painted on the trucks and tents.
The exhaust pipes of many of the vehicles including the tractor's metre long exhaust were filled with expanding foam as an obvious act of sabotage to prevent the vehicles from being used.
We also filled several of the locks of the vehicles with superglue and red paint was thrown over some of the larger vehicles.
The message should be clear by now zippos. Stop using animals in your shows or the actions will continue.