Since upgrading to pr1.2, my n9 email client has ceased working. It will not sync and sits indefinitely attempting to sync/ download emails but never does, neither when connected to wifi.
As well, my internet connection will not remain connected. I have changed the background settings and batter saver settings but regardless, after a few minutes of inactivity, my internet connection disconnects.
This is very frustrating, does anyone have any thoughts on the email?
As well, is there a way to downgrade to pr1.1 in the meantime so my email works?

No way to downgrade, but also no reason to.

Just reset/reflash your device.
Sometimes configurations get a little messed up during major upgrades. A clean flash will always work and perform better.

When attempting to use the Restore function it asks for a code of which i do not have nor ever entered one. Does anyone know the default code?
I am assuming this is the setting that needs to be used, my only options are Restore or Clear data.