The ''Swinging Sixties'' were a concoction of many things that brought Britain to the forefront - England winning the World Cup in 1966, mini skirts and mini cars, the Beatles and Twiggy. This was the permissive decade when the contraceptive pill became available, Lady, Private Eye and Oz magazine rattled the cage of authority. Above all, the Sixties will be remembered for the birth of British pop music, Carnaby Street and fashion, a new dance called the twist and the moment in 1963 when President Kennedy was shot.