Ubuntu repository not signed

The Ubuntu Debian repository is unsigned. This is not only a security risk but as well generates an annoying warning message every time all repositories are updated:
W: The repository ‘http://apt.isis.rl.ac.uk xenial Release’ is not signed.
N: Data from such a repository can’t be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.


I have added the necessary setup to the apt repository so that is signs the release files and updated the instructions at http://download.mantidproject.org/ubuntu.html with the required step to download the public key to your local keyring:

wget -O - http://apt.isis.rl.ac.uk/2E10C193726B7213.asc | sudo apt-key add -

After this apt update should no longer warn about these problems. Please let me know if there are any issues with this.



Works like a charm, thanks.