I thought nearly 4 hours was long enough for someone to have a punt. Dylan has passed by. There again that covers a lot of places. I think we need a name.
I'll have to give it to you. It is Brough Haven. Dylan's vids of his stay there would confirm it.
I thought more people would have a stab. Tomahawk was far too vague.
Wasn't sure which, thought probably Brough but not sure enough. I sailed from South Ferriby in the 90s. Not sure of the date of the photo but sure Winteringham didn't have a mark near it then. But not sure enough so hedged my bets!
Looking at Dylan's video the tripod seems to be to the south of the entrance now. The picture will have been early '90s.
Someone on here is a member at the Humber Yawl Club so could be definitive.