Need help composing from a different email address from mobile

Hi everyone. 

I need some help figuring this out. I am one of the old-school blueyonder customers, and I have three other email addresses assigned under my one main blueyonder admin account (as we were allowed to have up to 4 email addresses per email inbox account back then and choose which email to reply to people from).

I can log into my Virgin webmail from my laptop and reply to people just fine from any of the other blueyonder emails that are associated under my main admin account. These are available to select in a dropdown in the From field.

However, my issue is that I don't have any dropdown option when I log into webmail on my phone. I can't find an email selection option anywhere.

Up until the big change halfway through last year that has messed up these legacy blueyonder email accounts as well as caused other lasting issues for people, I used to be able to do the following on my phone when I was using webmail: Head into the settings then into Email, then Compose, then change my 'default email address' there in order to send or reply from one of my other blueyonder email addresses. But that doesn't work anymore.

Is there another way to switch email accounts to send and reply from when accessing the webmail from a mobile phone? 

Thanks in advance! 🙂