"CD" wrote

Sunday back to H&H £2.90 deducted, total cost £12.80 leaving 20p credit.Non
Oyster cost 2 x £5.30 singles + £7 Zone 1-2 Travelcard £17.60
Does I get that right? Or does an Oyster have to be bought in £10/£5
increments?

You have to pay a GBP 5 deposit when you get an Oyster card, as well as the
credit you put on it. This stays on, as well as any unused credit, if you
keep the card for a further trip to London, though you can get the deposit
(and any unused credit) back if you hand your Oyster card in.

Peter