 Nyorai kupfuurira kweiyi ndima - Musi waMay 26, 1940, Operation Dynamo, Kubviswa kweDunkirk, rakatanga, Montrose achirayirwa kutora rutivi. Musi waMay 28 akabudirira kubvisa mauto mazana mapfumbamwe nemakumi maviri nemashanu, achivaburitsa kuDover. Yakanga ichienda kune imwe nzvimbo kuenda kuDunkirk mangwanani-ngwanani aMay 29 apo yakasangana nebhangi rebhangi ne Sun V, ichiputsa mutsara wemuparadzi. Montrose aifanira kudhonzwa kudzokera kuDover nechokumashure-kutanga nechikweva Lady Brassey. Montrose yakanga ichigadziriswa paHarland uye Wolffs North Woolwich yard kubva 31 May kusvika 5 July 1940. Pashure pokugadziriswa, Montrose akabatanidzwa ne18th Destroyer Flotilla, Nore Command, yakavakirwa paHarwich. Muna Chikunguru 1940, muchikamu chekutanga cheHondo yeBritain, ndege dzeGerman dzakaita mushandirapamwe wekurwisa ngarava dzemahombekombe muEnglish Channel, uye musi wa27 Chikunguru, sechikamu chemushandirapamwe uyu, vakarwisa Montrose uye muparadzi, avo vaiperekedza vanotsvaira zvimbambaira kubva kuAldeburgh, Suffolk. Montrose akataura mabhomba maviri echiGerman akapfurwa pasi panguva yekubatana, asi akakuvadzwa zvakanyanya nekupotsa-kusangana izvo zvakamumisa, nepo Wren yakanyudzwa. Montrose aifanira kudhonzwa kudzokera kuSheerness. 