Many thanks for the very detailed response, much appreciated!
What counts as a 'light' rider? I'm somewhere around the 11.5 stone mark, so not light compared to other women of my height, but would be light in relation to (most) 6" men.
As far as mudguards are concerned, I wouldn't be deliberately going out in the rain, but I've found the tracks around here are often puddled even when the current weather is dry, so being able to fit mudguards might be useful?
I wouldn't be carrying much beyond water and one or two small snacks, as you say. I don't envision spending more than half a day out anywhere, and there are plenty of country pubs around should the need arise.
On balance it seems like the Broadman would suit my needs best, but the lack of mudguards does seem like it could be a worry?