thank you. the wife will be busy laminating at work next week
Punctuality is the politeness of Princes
At one point in Germany we had a problems with tree-huggers sabotaging ladders by cutting partially through them. Have you had that problem in the UK?
Nooooooooooooobody expects the Spanish Inquisition!! Our main weapon is.........
I have no knowledge of this area so I'm just mentioning something which occurs to me.
I suspect that using terms which imply that you've left something dangerous lying about in the countryside is unwise. If someone fell from your highseat and it was to go to court I can't help but think that you would face an argument which went along the lines of "you posted a sign saying that this high seat is dangerous, if you knew it was dangerous why did you leave it in a public place?" At this point it might not end well for you.
The same applies to shooting - putting up a sign saying "Danger - shooting in progress" is a bad idea as you open yourself to being asked why you are doing something you know to pose a danger. All the evidence indicates that shooting is perfectly safe, all the evidence also indicates that high seats are perfectly safe when used by authorised and trained persons and, therefore, neither present any danger to anyone.
As one with some experience in this area, you are really better off with a sign that simply says Keep Off. Even better if you can physically restrict access. But in all reality, fears of someone trying to sue an individual citizen in this country are largely unfounded. We all read articles about the potential for claims from these sorts of things, but seldom see actual cases brought before the courts. Signs need to be unambiguous and once you start trying to get too clever, you trip yourself up. Keep Off or Do not Climb etc have no potential to be misinterpreted. Once you start to use words like authorised it suggests there is some sort of test, register, log of who is authorised.
I think that those signs are acceptable. They do not indicate failure of the structure. And they are pictorial. For shooting activities, we should be trying to inform and instruct. Shooting in progress - keep to marked footpaths for example admits nothing nor really has the potential to inflame. But these are just examples. Look at road signs. Stop. Give Way, One Way No Entry etc. They don't go into anymore detail than that. Why should we?