britain 's public schools are now the very image of tradition but behind their establishment image lies a history of rebellion and revolution .
the hidden story of some of the country 's most prestigious and best-known public schools - including eton .
winchester college experienced six full-scale rebellion in the 18th and 19th centuries - one over beer rations .
years of research in the schools ' archives has shed light on tales of master 's held at sword-point , mass walkouts and battles .