"This meant driving 20 miles, plus a bit of a walk along the coast path, to end up only half a mile from my house; but I included a bit of weekly shopping half way through the journey so it wasn't too far out of my way."
Quite apart from the shopping, the trip was well worth while.You've produced three great images, worth looking at quite apart from their future role in Christmas cards. You managed to deal with what was a high dynamic range of dark rocks and glittering water.
I think my favourite is the first one but that may be only because it was the first one I saw! My recollection is that when you were working, you fished out of Salcombe Harbour. If that was the case then this is presumably a channel you know very well?
The first and third photos have sand or mud flats in the background. But in the second photo the channel marker appears to be relatively close to a rocky shore. Presumably the rocks drop off quickly there?
The second photo has in the background what looks like the ruins of a wall or ancient fortification just above the high tide line?