It may just be me, but I’m not keen on GNers promoting services on here for their own benefit. In fairness, Lydiasgran has been open and honest about it, but she’s only ever posted twice, this time and a similar post about a wine club. It’s an old post anyway, but the £50 per person is still available.
If you want to join Octopus, surely you could use a friend’s code, and help someone you know out at Christmas? There are plenty of Octopus customers to choose from (I’m one myself but no, I’m not about to post my code 😂).