Well, to answer all your questions I should just inform you that I'm still waiting a response from Nitwit Rail to the question I posed to them yesterday. As promised, I will post their response as soon as I get it. However, it should help to clear up the questions raised about the legal status of these signs and also their enforceability.
I would also like to say that I'm very disappointed that some folk here are taking this topic very personally. I know that I may have been guilty of that earlier in the thread for which I apologise, but I would have liked to think that we can have a grown-up discussion about this without the slurs.
To assuage Ferrit's obvious concerns about me, I can assure you all that I have no problems whatsoever with the written word. I am just not comfortable with simply ignoring a clear and unambiguous pictogram, unlike one or two other folk, nor do I believe that adding a layer of meaning that is not inferred in the pictogram is necessarily correct.
However, I would just like to pick up on a couple of points. The first is that pictogram in question is not there to identify who the sign applies to but the action or behaviour that could put a person at risk in an environment like the railway.
The second is that there
is an agreed standard for the size, colour and format of warning signs at locations required to display such warnings specified in the Health & Safety at Work Act; specifically The Health and Safety (Safety Signs and Signals) Regulations 1996. I've not read it because Acts of Parliament are enormously dull, but anyone facing a long and boring evening who is looking for something to help pass the time can find the full text starting
here.
O L Leigh