This is not duplicate of "When will my phone get the Android 2.2 update (FroYo)?" as I read there that official UK update was on 20 December 2010. I have phone in 3 and I cannot find any way to update.
If I enter into settings and try to do scheduled check it informs that phone is up to date. Firmware version is "2.1.-update1".
How to update to froyo