Whilst it has not yet been possible to identify the persons responsible for these threats, is there any evidence as to what if any group or viewpoint they represent ?
I am all for open public information in most situations, but I think in this case there are reasons for not speculating widely, so I am not attempting to answer the question. Let the police get on with doing their job as appropriate without giving those who have made the threats the oxygen and encouragement of publicity, nor any clues as to how the hunt to identify them is going. And don't give others who might be inclined to do similar the idea of being copy cats, with the publicity become a "how to" guide.
From me, a "Thank You" to Chris from Nailsea for his post of support and to all those members who have added their likes to his support. I appreciate that much more than a few words might suggest. And, yes, I always have one eye open for my personal, family and colleague safety. We all do all the time - every time we cross the road - but this extends to other risks if we are, even just a little, visible in public.