Let's say I'm travelling by Tube from Victoria to St Pauls, with a change at Oxford Circus from the Victoria line to the Central line. This would cost 1.50 according to tfl.gov.
So...would I touch my card only at Victoria and St Pauls? Or Victoria, Oxford Circus, and St Pauls?
You don't touch the card every time you change from one line to another, right?
(I promise I've spent hours reading these threads and the TFL website, and couldn't find this answer.)