If anyone has the same issue as me,
I was walking up from sandhills and my phone just wouldn't unlock. It was still "on" as I was listening to a podcast but it wouldn't unlock.
I restarted it and it was the same, I was advised to ask one of the "fan support" stewards outside and they just said you'll have to go to the ticket office.
They sorted me out. Just needed my Fan ID number, registered address and some ID. Printed a ticket and was in, just wish I'd been told to go straight to the ticket office.
Phone is fine now frustratingly