O2 reckon I need to pay the termination fee, but he's gone to check with his manager.
From that ID Mobile link:
The April 2023 CPI +3.9% adjustment will apply if you've upgraded to or purchased a new iD Mobile 24-month handset plan on or after 1st November 2022 and before 1st February 2023.
I'll probably be getting a 1 month SIM only, and it's after 1st Feb, so I'd be surprised if that applied (and even if so, I could just cancel)
From that ID Mobile link:
The April 2023 CPI +3.9% adjustment will apply if you've upgraded to or purchased a new iD Mobile 24-month handset plan on or after 1st November 2022 and before 1st February 2023.
I'll probably be getting a 1 month SIM only, and it's after 1st Feb, so I'd be surprised if that applied (and even if so, I could just cancel)