is this Westkapelle lighthouse ?
it seems that they add a cement building in front of the lighthouse in 2008,
https://www.flickr.com/photos/8511649@N03/2453537689/ (https://www.flickr.com/photos/8511649@N03/2453537689/)
51°32'24.3"N 3°26'12.6"E
I would say they removed it later
https://www.flickr.com/photos/26766574@N08/6680572975 (https://www.flickr.com/photos/26766574@N08/6680572975)
It seems was old signal station.
Oh, thanks, I see,
they also removed WWII old rail, anti US, British and Canada landing,
https://www.flickr.com/photos/150122418@N08/32911995201/ (https://www.flickr.com/photos/150122418@N08/32911995201/)