For residents of six London boroughs, as well as those in Smethwick in the West Midlands, the partial relaxation of lockdown rules this week hasn’t quite gone according to plan. They’ve had a day out in the sun, alright, but not necessarily sitting enjoying food and drinks in a pub garden – more likely they have been standing in a long queue to get ‘surge tested’ for the South African variant of SARS-CoV-2, the virus which causes Covid-19.