#70428, Tariq Ali and Vanessa Redgrave (holding the letter to the US Ambassador) lead the march, anti-Vietnam war demonstration from Trafalgar Sq to Grosvenor Sq Sunday 17th March 1968. A young Richard Branson is visible between them. At the time, I think he was editor of a student magazine. I was told the headband was a Vietnamese sign of mourning for dead children.