Just to further cloud the issue.
I have a fair idea what the place is.
I have no family or financial nterests with Kevin Platt but he does lots of very affordable seascapes.
It is not at all like Horsey Mill. The mill itself is far more tapered, though it has the four sails as shown. It fronts onto Horsey dyke and the ground to the left is farmland extending towards the sea. There is no navigable water there and no high ground. The mill is being lit from the right, so we must be looking at it from something like west. It vaguely resembles Horsey Mill but the scene is surely an invented one.
I'm wondering if it's Horsey Island in the Backwaters. The chart still has a wind pump marked. It's difficult to tell , but in the region behind the four moored barges in the distance may be the Naze Tower. Does anyone know if there was a wind pump of this kind ? It looks like high water but not much seems to be happening. Are the barges near the mill loaded with bales of hay ? but don't look like Stackie Barges.
Definitely not Horsey Mill, and the cap on the mill is unconvincing - no room for the gearing etc. Also the barges don't look right, no mizzens and the angles of the mainsails are wrong - may just be the lack of top masts/too short main-masts. I think it is from the artists imagination. Well composed and perfectly OK if those looking at it are not East Coast sailors!!
Looking at the picture and the photo I now think it IS Horsey Mill, though he got the "bonnet" at the top wrong - but the artist put it in an imaginary setting, which is rather a pity as the actual scene is one of those iconic ones, never to be forgotten.
I'm willing to bet that it isn't the work of a professional artist as the lack of drawing skills is evident on both the mill and all the boats. In addition, I have just noticed that the shadows are to the right of the fence posts but to the left of the mill.