In message
, at
04:29:14 on Sat, 21 Jan 2012, Mizter T remarked:
They do have pay-by-cell for parking here in London, however.

UIVMM none of the pay-by-phone (for parking) systems in the UK
actually take the payment directly from one's mobile bill / mobile
PAYG credit - they all require one to register with the provider (e.g.
https://www.myringgo.com/) first - which includes giving them your
credit/debit card details to store with your account - and then call
them in order to pay for parking.

I was about to ask:

"How is the money abstracted - is it direct off the phone's
credit (as if it was an expensive call of some kind), or at
second hand by sending reverse-charge SMS?"

....but you seem to have an answer already.

That's back to the sort of proprietary per-vendor schemes I've been
moaning about, where you have to register with each one separately to
"top up" or get a statement.
--
Roland Perry