I stumbled across an article accidentally but found it to be a good read, have a look: https://historygarage.com/beryl-swain-first-woman-compete-dangerous-motorcycle-race-world/ http://goodsparkgarage.com/beryl-swains-unusual-hobby-motorcycle-racing/ And in Walthamstow E17 there's a great mural of her, or at least there was. Perhaps somebody has seen it?