An experiment to establish the fluxes of many ozone depleting gases (CFCs, HCFCs, halons) and greenhouse gases (HFCs, PFCs, SF6) from the UK. Its aim was to assess regional emission inventories of these gases. Attempts will also be made to measure for the first time "new" ozone depleting gases, such as n-propyl bromide and hexachlorobutadiene, and to estimate UK emissions. The FAAM aircraft, fitted with air sampling bottles, is flown in the boundary layer upwind and downwind of the UK. The airborne campaign is taking place in the Summer of 2005.