Lively tale of youth gangs and the soapbox derby. Jimpy: Dennis Waterman. Patchy: Pauline Challenor. Harry: Frazer Hines. Squirt: Melanie Garland. Square Head: Jimmy Capehorn. Spuggy: John Moulder-Brown. Housewife: Gladys Henson. Stiggy: Robert Ferguson. Slab: Edward Martin.