How to edit permissions
For members of the CBU who want to edit pages, just add their username to the GoodGroup page.
For CBU people who just want to be able to read CBU pages, but don't need to edit, add their usernames to CbuGroup
For Cambridge imagers who want to edit, add them to CambridgeGoodGroup.
If Cambridge users do not want to edit, add them to CambridgeGroup.
If external (non-Cambridge) people want to edit, add them to FairlyGoodGroup.