Getting on the escalator at the underground station tonight, I noticed a sign reading:
STAND ON THE RIGHT
HOLD THE HANDRAIL
DOGS MUST BE CARRIED
Well, I was standing on the right, I was holding the handrail, and I certainly had no stroller. But I wasn't carrying a dog!
Luckily, no one noticed. But I'm thinking of getting something small -- a rat terrier? -- so that I can avoid trouble in the future.