The length, colour and style of dressing of human hair has always had immense emotive power.
Derek Parker considers, with illustrations from the fifth century until today, some of the more violent of these prejudices against the prevailing fashion. He talks to VIDAL SASSOON, famous hair stylist, DORIS LANGLEY MOORE , expert on the fashions of history, and JAMES HEMMING , psychologist, about the deeper significance of the way we wear our hair. Producer DENYS GUEROULT