買oyster好嗎？

Oyster card is the cheapest way to travel in London. You can buy online from British Council HK or you can buy from the counter in London airport.

留意既地方 is your travel plan, where you want to go and the zone area of the place. If you only travel inside zone 1 & 2, then the max charge for a day is GBP$4. The detail for other zone you can phone to British Council to ask them becasue there is different price for you to choose.