Transport for London is considering phasing out coins and notes next year and replacing them entirely with contactless payments - such as Oyster Cards.
TFL says it would help save millions of pounds. But thousands of people still rely on cash to travel around on London's buses every day, and critics warn it could put jobs and safety at risk.
Rags Martel reports:
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A few very isolated afternoon showers are possible with a maximum temperature of 22C.
Sadiq Khan argues people living in the capital should not be embarrassed about saying "first dibs for Londoners" when it comes to housing.