MIG wrote

...although interestingly, that strongly implies (to the extent that
any court would support) that Travelcard holders will only be liable
to a penalty fare if they fail to touch in on buses.

While 6.6.1 says that Travelcard holders are supposed to touch in on
LU/LO/NR, it doesn't specify any sanctions for people who don't -
whereas 6.6.4 mentions explicit sanctions for Travelcard holders who
don't use OEPs on NR, 6.6.7 mentions explicit sanctions for
Travelcard
holders who don't touch in on buses, and 6.7.3 mentions explicit
sanctions for PAYG users who don't touch in on LU/LO/DLR.

.. Which is particularly bonkers, since a bus journey can't exactly be
.. extended beyond zones.

.. Again, despite my deep suspicion of everything Oyster, I don't
believe
this is going to be used for PF purposes. I am sure that it's just an
attempt to get people into the habit of touching all the time, given
all the potential problems (which can't all be solved anyway). It's
one of those "terms and conditions" things that they can fall back on
if someone does try something on but there's no other technical
offence they can get them on.

.. I don't believe they are going to reprogram all the bus inspector
machines not to give a green light to valid travelcards. What kind of
entry/exit gets registered with a bus touch anyway?

Wearing my "think of a reason" hat, requiring touch-in on buses will
ensure the /forgetful/ won't travel free with an expired season ticket.

Other parts of the conditions of carriage remind me of Sir Alan Herbert
(who, in _Uncommon Law_ invented the negotiable cow).

12.1.3. You must not bring with you anything that:
• is more than 2 metres long

14.1. You can bring an assistance dog with you without charge. You can
also take with you without charge any other dog or inoffensive animal,
unless there is a good reason [...]

So parrots and other birds are OK if not too large.

--
Mike D