The PHE new report says about half are community transmission, so definitely needs stamping on. Some MSOA that have seen big case bumps this week; Kingshill Avenue, Elmsmead, Queensbury, Alperton - all with close links to India, if those aren't linked with travellers then likely to be the surge test areas. Bow, Heston, Northfields and Footscray possible; as the majority seem to be Ealing and Brent I expect only Heston will get wrapped in.
www.gov.uk/government/news/confirmed-cases-of-covid-19-variants-identified-in-uk
"Cases ofVOC-21APR-02 have increased to 520 from 202 over the last week and almost half the cases are related to travel or contact with a traveller. The cases are spread across the country, however, the majority of the cases are in 2 areas – the North West (predominantly Bolton) and London – and this is where we are seeing the greatest transmission."