Democracy is undermined if we silence whistleblowing sources in the public sector, argues Lucie Wibberley, who reports on the key issues arising from the trial of prison officer Robert Norman
Robert Norman, a journalistic source and prison officer, was jailed in 2015 for providing truthful accounts of the difficulties and dangers at HMP Belmarsh to journalist Stephen Moyes, in return for payment by the Daily Mirror and News of the World.