@Anonymous User
Unfortunately Arrow catch-up Boxsets never seem to appear on Now TV...... they must be held exclusively by another service, unlike the other Arrowverse shows that Now TV does seem able to provide as Boxsets.
So it seems that Catch-up Arrow episodes will only be available for that normal length of time as and when a new series is currently running on Sky One...... once they have gone it is unlikely that older seasons will reappear as Boxsets.
