I have something to add to this from DND papers studied by me. However, that may take time, and in the meantime can add that vehicle assembly in the UK was very slow in the period uo to the beginning of 1944. I allude to this in my book on Pearsons of Liverpool who were charged with holding a massive crates storage facility, along with one or two other sites.
For Canadian-UK monetary aid see my Paper at:
http://www.gmhistorian.btinternet.co...IANDOLLARS.htm
. Basically, from 1941 there was an agreement to supply Australia, NZ, and probably SA, with vehicles, equipment, etc. and payment was to be made through High Commissions in London. I suppose it was an equivalent of a 'Clearing House' with settlements either way. There must have been an awful lot of paperwork done in Canberra, Ottawa, Auckland, Pretoria, which was then sent to London!
As is known the UK and the US also agreed a 'Reverse Lend-Lease' for vehicles, aircraft, etc. and the same general agreement over supplies to the other Dominions is documented.