Pollution Check: Site visits - December 2011

December 21: Outside London Bridge tube (Joiner Street exit) and then inside an office building (anonymous)

December 15: Outside in a South London street then inside an office buidling (anonymous)

December 7: Outside in a Central London street then inside an office building (anonymous)

December 5: Outside High Street Kensington tube station, in shop basement and outside then inside the Royal Borough of Kensington and Chelsea's Town Hall in Hornton Street

December 3: Beside Brompton Road and in nearby residential street