Paul Corfield wrote:

Oh and while we're on this subject please tell me what fool proof
system Paris or Berlin use that prevents exactly the same problem
happening to tourists?

The Parisian system is best described as silly, though at least there is
slightly more consistency than London.

I probably don't need to tell you for Berlin, but the answer for those who
don't know is the correct one, which is that in Germany they do not sell
"bus tickets" or "train tickets" in city transport areas, simply public
transport tickets for a single journey involving an unlimited number of
changes of vehicle and/or mode, sometimes constrained by time but usually
not. Therefore, just as if you are turfed off a train early, your ticket
continues to be valid for the next one.

This is exactly how it should be. I recognise the issues you often explain
in implementing it in London due to cost, but it is IMO the right answer
for any fully regulated public transport system like London's, or indeed
the national railway system.

Neil
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Neil Williams in Milton Keynes, UK. Put first name before the at to reply.