[servicepub (RIP)]

Ed makes some very valid points. Canada had a policy, accepted by the UK, that certain items were to be "of continuing Canadian supply". This list included clothing, vehicles, insignia and small arms. There were a few acceptable exceptions to this such as any No4T could be issued to a Canadian formation rather than issue only Long Branch-made examples.
For those who are not aware, the UK charged Canada for any issues of British kit. In the early days the Canadian Army paid rent for British vehicles and then, later, bought vehicles outright. In return, Canada charged the UK for CMP's bren guns, Sniper rifles, optics, etc...
This meant that both sides employed a shadow army of accountants who kept track of who owed whom how much. At various times Canada (who was always owed money by the Brits) made a grant to the UK. In fact, when the Mutual Aid Act was passed the very first grant was for a Billion dollars - which covered Britain's war costs for a year.