A couple of barefooted youths with trousers rolled up trudge through Cheswick, west London, in the rain on April 3, 1961, as the Aldermaston column of ÂBan-the-bomb marchers set off on the last weary lap of their long trek to Trafalgar Square. Another column of marchers is converging on Trafalgar Square from Wethersfield, Essex, where there is a U.S.A.F. base. They spent the night in East London.