Boris Johnson has waded into the debate about cycling deaths - calling for headphones to be banned. Boris Johnson said those who ride while listening to music were an 'absolute scourge'. But it's not yet clear whether the Mayor actually has the power to enforce a ban, as Luke Farrington reports.
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Official readings are recorded three metres in the air but a study found levels of nitrogen dioxide (NO2) were higher at pushchair level.
Tubes, trains, trams, buses, cable cars, river buses, taxis and going by foot - your guide to getting around during the strike.
Union officials rejected a revised offer from Underground managers during a meeting at the conciliation service ACAS this afternoon.