Is the half matrix deliberate? Would it not work better with a full matrix?

The idea was to show that asymmetric flows could be shown, but I agree such an extreme asymmetry is probably too distracting. I will alter to use a more subtle weighting.

Typos here: chawed? weather? "This was very effective?"

Can we change "has a few problems" as it's easy to miss the "a" which changes the meaning completely! "is problematic for some important reasons".

This is great - we might say something about needing to make the cells a little smaller to convey some of the shape of Scotland?

The top paper has now been cited >200 times ... worth saying?

"the nature of connectivity between locations at a number of scales" under different lockdown scenarios. I'd use "capture" or "assess" rather than "model" in the final sentence of para 1.