On Mon, 18 Mar 2019 19:24:57 +0000 (GMT+00:00)
"Jim K.." wrote:

What ingenious acess methods / bits of access kit can the team
come up with or ideally recommend?

A couple of straight ladders with a scaffold board in between them, and
be careful how you balance (could probably sling a rope across too,
just be sure to lash the board otherwise pulling on the rope will lift
the ladders off the walls).