Thanks again must have missed the UK release.
Was trying it all afternoon and initially no joy. Made sure I followed all the pre-migration steps and could not understand why it didn't't show me an option to migrate.
Eventually called Support and the guy was brilliant. Turns out he learned something new too. In short if you have TestFlight installed, you need to makes sure you either all TestFlight apps. As soon as I downloaded Teslfight, exited any app I was testing, the option showed up. (Apologies if this has been mentioned before, but just iim case it helps anyone else out)
Can't believe that after all these year as a @.mac customer, I now have one Apple Account!
To be fair, that's one of the conditions listed in the support document.
- You can’t migrate purchases if your secondary Apple Account is used with TestFlight for testing beta versions of apps from a developer. Open TestFlight and select Stop Testing for each active and inactive app to remove it from your account.
Migrate purchases from one Apple Account to another Apple Account – Apple Support (UK)
If an Apple Account is only used for making purchases, those purchases can be migrated to a primary Apple Account to consolidate them.