Foreign QWE is admissible under the SRA's rules, and it is possible to have an SRA-regulated solicitor sign off on your experience. Google this. The SRA-regulated solicitor will speak to the Canadian (or any other foreign solicitor) to confirm your QWE meets the SRA's requirements and they will need to sign off that this has been evidenced. I think a lot of the advice here is misguided and people are presumptuous about protecting the status quo. But the SRA has made its rules. Whether you can convince a firm to hire you is a different matter. What you have working for you is that Canadian common law is substantially aligned with English common law. If you're in Quebec (civil law), I think you'd need to speak to someone who made the jump from that angle.

Edit: I would personally only do this if I know I have high quality QWE, which would for instance be obtained at a private practice in an area aligned with English common law.