Important to note that the Guardian is not actually financially successful at all. They have been suffering heavy losses for years
http://www.telegraph.co.uk/business/2017/02/01/heavy-losses-...
http://www.telegraph.co.uk/business/2017/02/01/heavy-losses-...
https://www.theguardian.com/media/2017/nov/26/financial-time...
https://blogs.spectator.co.uk/2016/04/will-the-guardian-now-...
A report by the Guardian on the very same topic.
2) It did make this deal offshore but it didn't save then tax. Good links above on this