Students at London University's Medical School have been recruited to undertake Britain's largest survey on penis size. Sponsored by Durex, this survey is intended to establish if there is a viable market for extra small condoms. Attractive female students have begun to interview male motorists and have managed to persuade a great many of them to have their penis size calibrated. In order to minimise inconvenience to the public and prevent motorists skewing the statistics by being measured twice, all the men whose penal size fell into the very small category (under 30mm) - have been given a white flag with a red cross on it to fly from their car windows.