Dave,
The main reason that neither you nor I would see them Keith is that we would not be looking for them.

But you said you did see a travellers welcome sign in Britain.

"I can only re-iterate what I have said before. In my experience such signs are not common. I have neen in a lot of pubs, all over the country for many years, and the only one I have ever seem in respect of travellers was in the Morning Star, Wardley, Mancheter which said 'Travellers Welcome!'"