- An app driven by a SIM card is installed in the bin
- An infra-red sensor in the bin works out how full it is
- Messages are then sent by text to Westminster City Council
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The high of 35C was recorded on a Bakerloo line train between Piccadilly Circus and Oxford Circus at 2pm.
Weather forecasters say temperatures could reach 35C, beating the previous record of 34.6C in the scorching summer of 1976.
After years of political manoeuvring over the future expansion of Heathrow Airport, there has been an important development this lunchtime.