People have been warned against having a "party weekend" as a former chief scientific adviser said the UK is "on the edge of losing control" of coronavirus on Saturday, Sept 12, 2020. The public has been urged to act "in tune" with Covid-19 guidelines before the "rule of six" restrictions come into force on Monday. The British government’s scientific advisory board announced on Friday that the reproduction number of coronavirus transmission across the UK was now over 1.0. The Science and the Scientific Advisory Group for Emergencies (SAGE) said the R-value was now between 1.0 and 1.2.