Paul Cummins wrote:
I've been thinking abot the Oyster card. I can see some of the major
benefits, lack of moving parts, no damage to ticket etc.

But I wonder if the primary reason for Oyster was to prevent
dumbelling?

AFAICS It's impossible, on any Oyster card, to Dumbell a journey.

Anyone disagree?

I suspect the primary purpose was to stop staff pilfering more than they
were getting in wages. When one station staff member died, they opened his
locker and found his pay packets (cash) going back years - he'd never needed
to take them home because he was pilfering more money than he and his wife
were able to spend.

--
We are the Strasbourg. Referendum is futile.