 Purley anonyanya kuzivikanwa nokuda kwezviito zvake pa 1973 Dutch Grand Prix, apo akasiya mujaho wake ndokuedza kuponesa upenyu hwomumwe mutyairi Roger Williamson, ane motokari yakanga yakatsvuka uye ichipfuta pashure pengozi yakakomba. Purley akapiwa menduru yaGeorge nokuda kwoushingi hwake mukuedza kuponesa Williamson, uyo akafa nomwoto. 