It's taken a while - I'm onto my third Nightingale sock - but finally it looks as if I will be able to get it on and it will fit.
I could, just, get the second sock over my heel but it was an incredibly tight fit and I decided that, in the long run, it was not going to work.
My other project, the Vivian cardigan/jacket, has reached the armholes and I now need to make the sleeves. For that I need some big size DPN's (Double Pointed Needles) which I've had to order in - so that is on the back burner for a bit.
Now I'll have no excuse for not making some decent progress on the socks.