“…However, in its email, 1 Defra stated its belief that the error ‘does not change the overall argument in the letter signed by Profs Henderson and Middlemiss’, despite the letter's additional errors and unsubstantiated claims based upon them, which remain unacknowledged. Middlemiss and Henderson's core argument relating to what they described as our ‘inappropriate grouping’ of data has already been addressed in our response to them, 4 yet they remain silent.…”