A part of south west London's history is being demolished to make way for thousands of new homes.
Earls Court, the exhibition centre, is being knocked down. Kensington and Chelsea's planning committee approved the scheme last night.
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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.