There still seems to be a lot of confusion over this update:

Make sure you have plenty of free space in rootfs by deleting as many applications and themes as you can.

If application manager doesnt see an update, even if you are in the uk, you will have to wait until tomorrow or learn how to flash your device.
If you see the update in the application manager but it tells you to use Nokia Software Updater (NSU) you will find that NSU will display your current firmware version. Either re-install your current version and then check again for the latest update in application manager, or wait until tomorrow for NSU to show the latest firmware