it is my understanding that the pedals are british pattern however this does not 100% mean it was british made so it could be british or..... a very early production canadian carrier made to british specifications. out of curiosity if you run some scotch brite over the top of the drivers front armour it may or may not reveal some numbers... unlikely if its an early one though.... it would help rule some things out. I must stress that this post is only an opnion from what i have learnt from Nigels books and the family here at MLU so as with everything carrier related take NOTHING for granted....and in the words of Shaun Hindle "keep an open mind mate"
PS a fantastic carrier worth saving though
Richie