Just had a read of the actual criteria. It's not going to work, as there's no anonymity for the "witness".
- Minimum of three clear photos of the act of dumping, dog's departure, picture of uncollected poo. (Owner doesn't have to be present.)
- Informant must establish dog owner's address
- Dog owner just needs to say "don't know what you're talking about" to the dog warden, or refuse to pay, and the informant would then need to appear in court as a witness.