Description:Mosquitos are prepared for combat, in the hangar and on the tarmac. Two girls put the finishing touches to a perspex cowling; mechanics work on the fuselage; girls hammer oleo legs into shape; a Mosquito is scraped down for painting and the tail is painted, outside on the tarmac; a 4,000 lb bomb is hoisted into the bomb bay; the tail fins are tested - 'Services O.K. 18/4/1944' is written on the propeller blade. A Mosquito taxies; a line of Mosquitos, ready for action, is shown.