
In theory dogs should be 'on display' at all times, which includes benches. In practice it's not necessarily what happens. I tried to do a site search for this topic from a few years back because at that time I contacted the KC as did many other exhibitors to clarify the position re soft cages. Their initial response was that these were not allowed however they did make an announcement to the contrary but I can't recall the wording nor can I find the old thread. Even so, the position may have changed since then.
I would not have my dog on a bench at any show, but especially Crufts, without being in a crate of some description. Most exhibitors I know who use metal crates cover them with towels so the dogs can rest and relax - therefore not 'clearly visible' by any means to the GP. Equally I know of many who use soft crates at Crufts too which means 'very limited visibility' if any from a display to the public POV.
As it happens this year I think anyone exhibiting a dog will have to be very much on guard in case there are protestors or extremists around - I certainly will not be leaving my dogs on 'display' unless they're across our laps at the time!
I do not believe the KC should permit anyone other than exhibitors to enter the benching and grooming areas. They have a DD section at the show after all on top of the dogs being visible when competing in the rings.
One day the KC may just listen to the exhibitors - without whom there would be no show - and put the safety, comfort and wellbeing of the dogs first!