After canceling, you’ll still have access to BritBox until the end of your current billing cycle.
Example:
If you’re on a monthly plan that renews on the 15th and you cancel on the 7th, you’ll be able to watch until the 15th.
To avoid being charged for the next cycle, make sure to cancel at least 24 hours before your renewal date. You can also find your renewal date in your BritBox account.