Yes But I am not in the UK. I think you should get the update very soon
3rd February is the old G99*BXXU1AUAC release.
The latest release is...
The update = G99*BXXU1AUB3
Build date = 03 February 2021
Release date = 04 February 2021
Camera version = TBC
One UI version = 3.1
Android Security patch = February 2021
B3 is available for UK (BTU) S21 Ultra.