That's a nice cat ladder. One of ours will climb the loft ladder whenever one of us is up there for something. He's really fast too. Takes him a lot longer to get down, although he always manages in the end. When I'm finished up there and I want to shut the hatch, he gets dropped through the hatch unceremoniously, if I can catch him!
I would like to think it was a RCD protected 6mm to the shed but it does not look like its going there so maybe the customer just wanted a new shower supply but did not want to rip up the floors to do it