To add a shortcut on your phone to MySelf(iTrent), you can do so by accessing the link below on your phone via the Edge browser, signing in, and once you've reached the iTrent home page, Press the 3 lines or dots in the bottom right of your screen and go to 'Add to Phone'
https://sharedpayroll.braintree.gov.uk/colchester
From there name the Shortcut MySelf and hit add.
You'll then have a direct link to MySelf on your phones home screen, it will still ask you to sign in and authenticate when you access the shortcut but you wont need to sign into Office 365 first.