To access BritBox, you need to use your BritBox username and password. Regardless of whether you sign up directly through BritBox or through your Roku account, you must establish a BritBox account, including username and password. This is what you must be using to log into the BritBox channel.
See my original reply on this thread for more information, or contact BritBox for help identifying your username and password, or for more help resetting it. You can reach them here: https://www.britbox.com/us/help
I also have the same problem. All we are asking is will there be a time in the future wh3n britbox will be available through roku in the uk as it is clearly in the USA
Britbox has not yet been made available by the channel provider in the UK on the Roku platform. Each channel provider determines the regions in which their channel is available on the Roku platform.
Please reach out to Britbox directly for any inquiries or updates, and to share your interest in seeing their channel available on Roku in your location. The channel will only become available once the channel provider authorizes the channel for publishing in additional locations.
Just to say I have just got a Stick+ and now find the same problem as others have, Britbox is not available on Roku. I feel conned by Roku as they have not made it clear they do not provide Britbox in the UK.