ATNotts
You didn't even read my post. Never said it didn't exist. I said, what studies, data and evidence were presented to explain it's 70% more transmissible. 70% is a very specific number, they could have said "a lot", "more" "very transmissible" - but instead it's an actual figure, so I'd expect some exact data to back that up.
I've not been able to find it but perhaps I've been looking in the wrong places.