Not too sure the law has been tested. As long as you have a cert from the vet who carried out the opp and proof of being chipped, you are ok. However on another note, having got an invite from Great Yorkshire show last year to show my dogs, I called them to question showing my dogs with docked tails after ban was introduced. Not happy with their answers, I went on to call organisers, RSPCA, Dog wardens, Council, Police, and head office vet council to see where I stood regarding showing docked tailed dogs,(not that I implicated any or TGYS) each one seemed to pass the book regarding who was pol