I think this is a cue for my swan story and I apologise in advance if I have already told it on here.
My parents live in Scarborough, which is quite a famous English sea side town.
In Scarborough there is a well known park, it has walks over bridges set around an ornamental lake.
We were visiting there with some of Brian's friends from Manchester.
All of a sudden the friend's wife pointed to a sign on the bridge which said: swans must not pass beyond this point.
She looked very puzzled and said to me: but how do the swans know?
At which point I fell apart laughing: the sign was referring to the swan BOATS, not the real swans that were swimming along with them!
My pal was most amused that Yorkshire swans were so clever, they could actually read!