One Direction have paid tribute to teenage fan who died after suffering a suspected heart attack at school in Hounslow on Tuesday.
Magadelena Szablinska regularly met members of the band and ran a twitter fan site called 1DCrew.
Harry Styles tweeted 'It's incredibly sad to hear the news about Magda. She was so so lovely, I am thinking of her and her family'.
More top news
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.