Neil Williams wrote:

Incidentally, I don't find the idea of ripping off tourists and
non-Londoners (which has been mentioned as a target) remotely
acceptable.

Neither do I. But then nor do I find it remotely likely either. Whenever
I've travelled in foreign parts, the local tourist publicity has always
been informative about how to get the most out of local public
transport.

I think you are tilting at windmills.
--
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(A 33/1+4-TC combination at London Waterloo: 33 104, 28 Mar 1981)