Lineage assignments of 1635 SARS-CoV-2 sequences of samples collected from day 2 international arrivals in the UK between 11 March and 14 April 2021. Variants of Concern B.1.1.7 (n = 1317), B.1.1.7 with E484K (n = 3), B.1.351 (n = 69), B.1.617.2 (n = 28), and P.1 (n = 6) are highlighted in orange, Variants under Investigation B.1.617.1 (n = 49), B.1.617 (n = 9), B.1.617.3 (n = 3), B.1.525 (n = 34), and B.1.318 (n = 7) are highlighted in yellow and Variants under Monitoring A.27, B.1.214.2, B.1.526 and R.1 (all n = 1) are highlighted in blue (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.).