On 2020-10-04 a superspreading event most likely occurred in Wales. 24 days later (2020-10-28) it started to super-spread through the community. A total of 60 copies of this genome (that represents the core of the outbreak), were reported in Gisaid, a proxy for primary transmissions, along with 444 genomes that are one-step mutation with respect to the core genome (a proxy for secondary transmissions). The signature for the likely superspreading event ends at about 2020-11-05, 32 days after it started, with 15129 sequences found in total.
The last sequence of the superspreading event was collected on 2021-01-25.