@Tom55 Thank you for the offer of further support.
I do have one issue left which I haven’t been able to fix. After Iode initially loaded I then tried to lock the bootloader however I could then only access the bootloader menu.
I found this post below which enabled me to boot into Iode again after changing the active slot from a to b but I still haven’t worked out how to lock the bootloader.
I probably missed something obvious in the installation process, so I’ll search for a solution this week.
Thanks again for your help.