Two months earlier, in July 2020, the Government Chief Scientific Adviser, Sir Patrick Vallance, told the Science and Technology Committee that extra testing capacity would be “essential” ahead of schools reopening.306 However, he suggested that the Government did 298 GOV.UK, UK reaches 200,000 coronavirus testing capacity target a day early: 31 May 2020, accessed 17 September 2021 299 National Audit Office, The government’s approach to test and trace in England—interim report, 11 December 2020, page 10 300 Oral evidence taken before the Science and Technology Committee on 17 September 2020, HC (2019–21) 136, Qq1327–1329 301 Oral evidence taken before the Science and Technology Committee on 17 September 2020, HC (2019–21) 136, Qq1314–1326 302 Oral evidence taken before the Science and Technology Committee on 17 September 2020, HC (2019–21) 136, Q1306 303 HC Deb, 20 July 2020, col 1855 [Commons Chamber] 304 Q346 305 National Audit Office, The government’s approach to test and trace in England—interim report, 11 December 2020, page 50 306 Oral evidence taken before the Science and Technology Committee on 16 July 2020, HC (2019–21) 136, Qq1149– 1154 70 Coronavirus: lessons learned to date not have the capacity to meet the potential demand of over 350,000 tests per day, a figure suggested by the Academy of Medical Sciences at the time.307 Nevertheless, Baroness Harding suggested that the level of demand encountered in September was “in none of the modelling” used by NHS Test and Trace to assess capacity.308 She told the Science and Technology Committee that capacity plans had been “based on SAGE modelling for what we should be preparing for in the autumn”, and that it was SAGE’s assessment rather than NHS Test and Trace’s.309 However, she later wrote to the Committee in a follow-up letter to clarify that SAGE had not informed the capacity targets: SAGE has not been responsible for providing modelling analysis on operational testing capacity […] In order to model and for