Coming soon to a screen near you. ??
— BritBox Canada (@Britbox_CA) January 16, 2019
BritBox is currently $8.99/month or $89.99/year (a 7-day free trial is available), and can be streamed via browser, app on Android and Apple, Apple TV, and Roku.
Note that there may be some differences in program availability between Canada and the US, dependent on current licensing arrangements.