Which postcodes are included?
So far, variants of concern have been identified in Tower Hamlets in 10 sub-districts in the postcodes E1, E2, E3 and E14.
Neither Tower Hamlets Council, nor NHS Test and Trace, has provided details of how many cases have been identified in these areas.
Testing has also begun across the IG1 and IG6 postcodes, and will take place in small areas of the IG5 and IG7 postcodes.
The council’s community testing team are offering door-to-door PCR home testing in the above for anyone aged over 11, regardless of whether they have symptoms or not.
Those who do not have symptoms can get tested by visiting test sites at Ken Aston Square, Mildmay Road Car Park and Gants Hill Library Car Park.
Enhanced contact tracing will be used on anyone who tests positive with the variant.
Anyone with coronavirus symptoms is urged to stay at home and book a test online or by phone.
It comes as the number of people in England estimated to have Covid-19 dropped 40 percent in a week, according to the latest figures.
Coronavirus figures across the UK have been dropping significantly in recent weeks, even as restrictions have now been lifted in part across all four nations.
The Office for National Statistics (ONS) data shows an estimated 54,200 people were likely to have tested positive for Covid in the week to April 24, down from 90,000 the previous week.
The Government reported seven new coronavirus deaths and a further 1,907 infections on Saturday, making the total number of deaths recorded within 28 days of a positive COVID-19 test to 127,524.