rejecting the source also rejects the claim he was influencing SAGE.
i do work in medical information and that early there was naff all real data to go by, all theoretical models and predictions. you could pick a model to support your position.
did we not learn from the Cummings attending SAGE story that he pushed lockdown? and we know Vallance was in favour of natural herd immunity. so im not clear who Johnson was listening to. i suspect neither until he was pushed to make a decision, by which time everyone was saying go to lockdown.