Three boys from Surrey who all have the condition cerebral palsy have joined forces to find a way to improve their lives. They've been fundraising to help pay for surgery in America which can have amazing results
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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.