Looks like the Boulton Paul P111?
Planegill has it, the Boulton Paul P111!
I must admit the Canadian connection was somewhat tenuous in this context, but the inimitable Ben Gunn, MBE, CTP of Boulton Paul from 1949 to 1966 had good friends in Canada dating back to the BoB. When Ben later became Director of Shoreham Airport and spearheaded its revival, many DHC Twin Otters and Buffalos on delivery flights to the middle/far east routed through Shoreham as a transit stop.
I have it on impeccable authority that the UK's supply of Canadian whiskey and Sweet Cap fags may have been occasionally replenished.
Ben, of course, was better known for the contribution he made to the development of powered flight controls at BP. This led to him involuntarily leaving the later P120 as it disintegrated around him over Salisbury plain, following an aileron flutter event. To hear him retell it kept us young guys enthralled.
Over to you, Planegill.