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The American Enfield is known as the M-17 or Model 1917 rifle. P is for Pattern, a British nomenclature.
If you use the search function, there have been several threads on these rifles. There were pictures of some of the West Coast Home Guards using them.
Also, there are pictures of RCAF personnel using the Model 1917, mostly for parades, guard duty, marching with the Flags, and Honor Guards.
In 1940 the British Purchasing Commission bought 500,000 Model 1917 Enfields from the U.S. Government, and 80,000 of these went to Canada. After March, 1941, when Lend-Lease was signed, additional Model 1917 rifles were obtained.
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