In an unassuming building on an industrial estate outside Oxford, Michal Bilski sits in a windowless room with electric fly swatters and sticky tape on the wall, peering down a microscope. On the slide before him is a line of mosquito eggs that he collected less than an hour previously and put into position with a brush.
Bilski manoeuvres a small needle filled with a DNA concoction and uses it to pierce each egg and inject a tiny amount.
