I'm going to London for the first time in a couple weeks. There's very
little price difference between a Peak Day TravelCard and an Off Peak Day
TravelCard, I'm not exactly sure though when one can be used and when one
can't. I can't find anywhere that lists when peak times are and when it;s
not possible to use my Off Peak Travelcard? can anyone give me an idea? or
is it better to just purchase the peak card?