Getting up from the table and heading back, I saw this and went to investigate..

Some kind of winch and a small door round the back, and a window to a pantry with peeling paper

This side had a notice..

Welcome in? Don’t ask twice ;p

The door’s hard to open..

But you can keep it open with this:

And while you’re looking up, look at the loft:

Inside there were (I think) posters of research in the area..

As well as ropes and fishing nets: