Paper was discussed at SAGE 23rd July. Over a month ago. I'm not surprised that you want to nit-pick over someone saying "a month ago".
What SAGE are in a nutshell saying is that the knock on negative consequences of the lockdown measures are forecast to be greater than the lockdown positives.
They justify that by saying - ah well but without lockdown...... and many believe that without lockdown the outcome would not be as SAGE and Ferguson thought.