Yes, it’s got three bolts inside, they’re firm when moved from the outside. It’s only the fibreglass below the crack which moves when I pushIs the skeg bolted in place? Also worth getting someone to 'move' the skeg whilst you look inside the boat to see what is moving there.
Yes, it’s just the fibreglass below the crack moving. There are bolts so I can probably get the skeg out for a look. At the moment it looks like it’s just the skeg and not the hull which is damaged. I’m not sure what happened - the harbour dries out and there were a couple of storms, so maybe a bashing around while stuck in the mud?From the photo it looks like its the skeg moving not the hull. As previously said, check inside the boat whilst moving the skeg and see what is moving. It looks like the skeg is bolted on so maybe just needs tightening but I'd be thinking why is it loose? Given the current climate and not being able to use the boat I'd probably drop the skeg anyway if there was nothing obvious and have a good look at the laminate in the hull. Then I would know I had got to the root of the problem. Look on the bright side, given you've got access to the boat and you can work on it, it'll keep you from getting bored at home.
I wish I had access to my boat, lots of things to fettle and she's there and I'm here.