Weekly totals of variants in United Kingdom (by specimen date)
Week 51 52 01 02 03 04 05 06
NB.1.8.1 20 20 15 30 13 3 1
XFG 67 37 44 48 15 2
BA.3.2 12 18 14 17 9 6
Total 108 77 76 98 39 12 1
NB.1.8.1 % 19% 26% 20% 31% 33% 25% 100%
XFG % 62% 48% 58% 49% 38% 17% 0%
BA.3.2 % 11% 23% 18% 17% 23% 50% 0%

Last Updated: 3rd February 2026 21:58 GMT — Local:

Growth Charts

Growth chart for NB.1.8.1
Growth chart for XFG
Growth chart for BA.3.2

Acknowledgements

We gratefully acknowledge GISAID and the many data contributors around the world for sharing SARS-CoV-2 sequences.

This analysis makes use of the Nextclade CLI.
Aksamentov, I., Roemer, C., Hodcroft, E. B., & Neher, R. A., (2021). Nextclade: clade assignment, mutation calling and quality control for viral genomes. Journal of Open Source Software, 6(67), 3773, https://doi.org/10.21105/joss.03773

Special thanks to Josette Schoenmakers ( @josetteschoenma.bsky.social on BlueSky @JosetteSchoenma on Twitter) for the table concepts.