Hi, thank you for your question. If you were not divorced in Canada then you can pursue a divorce in England. As you have been separated since at leadt 2004 you can apply under the fact of 5 years separation and you do not need her consent or agreement - all you will need is to prove to the coirt that she is aware of the petition.
If you have any further questions regarding this please let me know. In the meantime if you found this information helpful please provide a positive rating using the stars at the top of this page. I will not be credited for answering your question without a positive rating. Thank you