I was messing about with the remote play feature trying to get it to work on my sons account and the magic happened lol
1. Login to master account (the one the vita is synced to)
2. On the vita go to PS4 link then remote play.
3. Your now connected to PS4 but the PS4 controller is now disabled activate it again by pressing the playstation button it will take you to user account screen and select the secondary account.
4. Once your logged in the screen switches back to you main account press the playstation button to switch screens, now you can control the vita using the PS4 controller and play all your games perfectly
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