As I said in the post I tried to be clever by setting up an email address specifically for the purpose of confirming the account. And haven't used it since. And didn't write it down! So, the combinations of names, passwords and email providers is pretty endless. I tried for two days and found nothing.
So I decided to move my attention and write this post, which I hope will help others :)
Thank you for your support at this testing time 🙏🏻