What’s the logic behind local lockdowns?

One in seven Britons is now under increased lockdown restrictions, after a return of measures in the north-east added an additional two million people to the list. Those in Northumberland, Newcastle, Sunderland, North and South Tyneside, Gateshead and County Durham will not be able to mix with other households (outside of support bubbles) from midnight, while restaurants, bars and pubs will be subject to a 10 p.m. curfew. Health Secretary Matt Hancock announced the latest lockdown measures in the House of Commons this morning, citing a rise of Covid-19 cases in the area. Despite more than ten million people in the UK now being subject to some level of increased