As an update on this:

Due to a recent Flickr update, the "Photos" feature on NEB stopped working. Liam has now fixed the issue, and it is fully functioning again.
If it is showing old photos, refresh the page and it will update to show the most recent photos tagged with #NEBuses, "Arriva North East", "Go North East" or "Stagecoach North East".

Ta for alerting us to the issue!