Most Tube station and all DLR station ticket machines (except at Lewisham, Woolwich Arsenal and Shadwell from Monday 10 August) are only accepting bank cards. You can top up using your contactless and Oyster account, the TfL Oyster and contactless app or an Oyster ticket stop. Ticket machines at all London Overground stations are still accepting cash.
HAMMERSMITH & CITY LINE: Saturday 19 and Sunday 20 September, no service between Hammersmith and Barking. A special Circle line service operates between High Street Kensington and Barking (via Victoria)