According to the Covid-19 genomics UK consortium database, in sequences up to 11th May, there have been 1,604 instances of B.1.617.2, making it the second most common variant in the UK.  Public Health England have designated B.1.617.2 a “variant of concern”, acknowledging it appears to be at least as transmissible as the dominant so-called Kent variant in the UK.

Covid-19 genomics UK consortium database

UK government poised to declare Delta coronavirus B.1.617 a Variant of Concern or VOC

https://www.coronaheadsup.com/africa/who-b-1-617-indian-coronavirus-strain-is-now-a-variant-of-concern-or-voc/