What does the "UK" mean? United Kingdom or Ukraine?
In Ukraine the update is already done! It was really prompt.
Try with a different SIM card - I had to try a different mobile network provider in order for the update to show up. You should be able to pick one up from a shop for free (or very, very cheap). It doesn't even need to be activated.
See this discussion for more information: https://community.phones.nokia.com/support/discussions/topics/7000010948