Hello, my name is ***** ***** it is my pleasure to assist you with your question today. The usual 'spendng' of convicitons in the UK does not apply abroad, such as to determine your elginility for travel to another country. So even if this conviction was considered spent in the UK, it does not mean it is spent when the Canadain authorities determine your suitability for travel. You would still be required to declare that and convince the border authorities that you are rehabilitaed and no longer may pose issues if you were allowed to travel.
A guide to these rules can be found here:
You are most likely to be able to apply for deemed rehabilitation when you enter the country due to the age of this offence and the fact you have no
I hope this has answered your query. Please take a second to leave a positive rating, or if you need me to clarify anything before you go - please get back to me and I will assist further as best as I can. Thank you