I signed up online, where the Britbox website required that the PIN have at least 3 of the following: Upper and lower case letters, numbers and characters. You MUST do this or it wont take the PIN, but when we went to watch Britbox on the TV with Roku, we had to click on Subscribe to try to watch anything, and when we did, we got a screen with our email showing as user ID, and a space to type in the PIN. Of course, there are no letters on a TV or Roku remote, so that is impossible. I went around and around with Britbox customer service, they put in a ticket for tech support which generated an auto-email saying sorry for the trouble with buffering, which has nothing to do with the actual problem, and we heard nothing further. After 2 weeks of waiting, I called for a refund as they charged my cc for a full year. They tried to say it was Roku's fault not theirs, but I said then how come other people can use it on Roku but not us. They couldn't answer. They said would refund - hope they do. Acorn doesn't have this PIN problem, so I went with them instead. Too bad, Britbox has some great shows listed, but no good if you cant actually watch them.