Britbox app is jumpy, how to uninstall and reinstall

You can use the official Roku remote app on an Android/iOS phone/tablet (https://www.roku.com/mobile-app) to remove a channel that you cannot remove via the standard Roku user interface. .

When in the Roku remote app on you mobile device:

• At the bottom of the first screen, click "Devices", and if necessary connect to one of your Roku devices.
• In your connected device click on "Apps on Roku".
• Click AND HOLD the channel you wish to remove (a quick click will bring up the remote controls instead).
• Click on "Remove" and confirm.

Note that this will remove the channel from your Roku account, but it will NOT cancel any paid subscription you may have for this channel.