In London, Collishaw learned he was to be posted back to Canada, and was in the midst of a tour of the latest pilot training procedures in Britain when the Armstice was signed. He was informed by the Air Ministry that he might participate in an attempt to fly across the Atlantic using a 'Super' &lt;a href="Handley%20Page%20V/1500"&gt;Handley Page V/1500&lt;/a&gt; long-range bomber, but this was scrapped due to unwanted media publicity. He took an extended leave in Canada in before returning to England in the early Spring of 1919, being promoted to lieutenant colonel.