What happened to evidence based medicine?
This is evidence based medicine. Nothing is black and white in science. You can't prove something, only disprove it or suggest something is likely to be true. The minutes are couched in the cautious language of scientific papers.
It might read as being a bit wishy washy but translated to plain English, they are pretty damn sure the new variant is a lot easier to catch than previous variants.
I agree with @Backyard72 the bit about antigenic escape is concerning, although they do say there isn't enough data to conclude anything yet.
The Bonsall paper about the link between viral load and the N501Y mutation doesn't appear to be available yet. If anyone finds it, I'd be interested to read it.