If your Father held the property in his own name which your mother wished to sell a grant of representation would be required and you will be able to obtain a copy of the will, moonglow is absolutely right the fee is £6 and the office has now moved from York to Leeds, google will find the address, they may take 2/4 weeks to respond.
I read your earlier question which factor was kind enough to show and whilst in England there is no time limit in which to obtain grant of representation, I think you will be best to direct your enquiry regarding a 40 year old will in one of the 14 provincial & territorial areas of Canada to:
Federation of Law Societies of Canada
World Exchange Plaza
45 O’Connor Street
Suite 1810
Ottawa, Ontario
Canada K1P 1A4
Tel: 613.236.7272
Fax: 613.236.7233
[email protected]