Don’t do it. I wasted my time going to a physical fast track appointment.
I’ve been on twitter and found lots of people getting calls the day before there holiday to collect passports on the day or day before.
Just email the upgrade team that has your application and pray – that’s all I can do now.
London (my local office) acknowledged my email and liverpool didn’t (they have the application) – they said they are working in travel order. I’ve got a week to go!