During the period 18 September to 5 October 2020, SARS-CoV-2 virus was circulating with significantly higher prevalence than between 20 August to 8 September and infections had increased substantially across the generations and country, with 60 in 10,000 infected.
Update from the REACT-1 study for October 2020: https://www.gov.uk/government/statistics/react-1-study-of-coronavirus-transmission-october-2020-final-results