On liability and 'right to roam'...
There is no 'right to roam' in England. What there is, is land designated as 'Open Access'. On such land, the public is allowed to roam at will. To walk on land not so designated would be trespass.
There seems to have been no thought given to public safety in introducing these changes. For instance, on the moorland farm there are hundreds of acres now designated Open Access. Many of them are fenced off and treacherous. But now the public have a right to walk across them. When one of them has an accident, or more likely loses a dog in a bog, will there be liability attaching to the farmer / landowner? Defra tell us not - but sooner or later there will be a test case, no doubt.
When they were doing the designations, farmers could make representations as to why such and such a field should not be designated 'Open Access'. I wasn't farming at that time but I think that one of the reasons you could give was that you needed that field as a bull field, where bulls may be kept without cows, or where dairy bulls may be at large.
I could get on my hobby horse again, and rant on
about people no longer being responsible for the consequences of making their own choices, or even knowing
how to be responsible for making their own choices. It's as though we want a society in which anything bad which happens is always someone else's fault and you can sue them for it. When I holidayed in Hawaii I was taken aback that I wasn't allowed to trot or canter on a hack - clearly the owners were only happy to take responsibility for our safety at a walk. Not why I hired a horse! (Although the scenery was lovely from horseback.) Don't want to live wrapped in cotton wool - too much like a padded cell for my taste...