On Fri, 27 Nov 2009 04:41:58 -0800 (PST), John B
wrote:

Under your "touching out is mandatory for Travelcard users" model, I'd
be penalised for doing this, because I'd have touched in at Waterloo
and wouldn't have touched out anywhere.

No, because you'd mark the BZ tickets as "only valid with Oyster card
number N" and make them open the barriers at both ends, so you
wouldn't touch your Oyster at all.

Neil

--
Neil Williams
Put my first name before the at to reply.