If I have set up more than one e-mail address on BT.com (never mind why), how can I view each separately?
You have not explained very well what you are meaning ie. You want them totally separate with different passwords and can not be accessed from the master accounts MyBT. If that is what you want have a look at this.
My problem was even simpler than the one you have solved.
I have set up three new addresses but I don't seem to be able to see them on the e-mail page. I get one and I can't see a tab (or anything) that takes me to the other ones.
I am not on the migrated BTMail so I don't know if this will work but on BTYahoo you can have the emails accounts all coming in to the one account if you go into Mail Options > Mail Accounts > Add the accounts that you want. You should then get a drop down box to be able to select the account you want to use.