Well, an update on this. No response to the messages I left re this advert but I haven't followed it up. That would have been too easy, I suppose.
Still extremely unsettled. I check out ferry prices/deals daily.
I recently spent a week with my daughter and grandson, including taking him out for the day with xw#1. She also loves France and a couple of years ago contemplated moving there. I talked this through with her, she thinks I should go and she'd love to go too.
I live just 5 mins away from my son, estranged DiL (we all get on fine) and my grand-daughters (4 & 2). They are very special to me (and coming for dinner later today). I would miss them very much.
And there's another complication. I am close to a lady who lives a few hundred miles away. She is a university teacher, separated from her husband, doing her PhD. She would love to move in with me but there's an issue. I am 58 going on 40. She's 60+ going on 60+. Worlds apart, really.
I need to do more thinking. Or I need to do less thinking.