 Nyorai kupfuurira kweiyi ndima - Muna May 1940 apo Isis yakanga iri muchiteshi nokuda kwekugadziriswa, Clouston akabatanidzwa kuNaval Shore Party yevakuru vasere nevarume 160 pasi pokutungamirirwa kwaKaputeni William Tennant akatumirwa kuchiteshi cheDunkirk kuti abatsire kuronga kubviswa. Boka reNaval Shore rakatanga kupinda muchikepe chinoparadza paDover ndokuenda musi waMay 27. Vakuru vatatu vakagura makadhi nokuda kwemigove yavo. Clouston akakunda eastern mole, mugwagwa wakamanikana wamatanda wakaiswa pabhuruu rekongiri, rakanga risina kugadzirirwa kushandiswa nezvikepe, asi chikamu bedzi chechiteshi chakanga chisina kubhombwa zvikuru neLuftwaffe. Kwamazuva mashanu akatevera, Clouston akaronga ndokuronga kuyerera kwavarume nomumugwagwa unoenda kuzvikepe zvaimirira. 