Claim: Laurie Hislam (born in 1909) planned the Grosvenor Square demonstration the breakaway rom the main CND march.
Evidence: Laurence Hislam (1909 – 26 August 1966) was an English peace activist. In March 1961 Ralph Schoenman visited Laurie in Gloucestershire and the two planned the breakaway 'Grosvenor Square' demonstration while walking with the family in the wild daffodil fields of Dymock. This was a breakaway from the main CND march from Aldermaston to Trafalgar Square.