UK-Canada CGT Double-Treaty?

I'm a UK resident looking to invest some of my money in some Canadian stocks in Canada. In the event of selling said stocks, how does the double tax treaty work between both countries? From my understanding, there is a 25% withholding tax that Canada applies on non-residents. How do I redeem this with HMRC, as the capital gains tax rate is different for UK residents?

Hi,

HMRC cannot comment on future events as legislation may change. However, based on current guidance, you can only claim relief up to the amount of UK tax that would be due on the same source of income.

Thank you.