> Assuming that your changing this in your PR @pp-mo? (as above)

Yes, but don't hold your breath, as it's currently both unfinished, and mixed in with other cosmetic improvements to the code in https://github.com/cpelley/iris/pull/23 

If wanted, I could pull this stuff out into a separate PR.
However, as @cpelley already suggested, it's probably simple to wait until other changes have come through.