Room with a view

Off to Lindisfarne Castle today but, as usual, sod's law prevailed and it was covered in scaffolding and tarpaulins so I had to make do with a shot of it on the back of a National Trust van parked in the car park. On the way off the Holy Isle I stopped on the causeway to take a shot of this shed on stilts before the tide rolled in.

I have no idea what it's for but I wasn't hanging around to find out.