Lvl1 labels for hierarchicalMenu dropdown button text

Hi

If someone could point me in the right direction I would be grateful.

I have a Dropdown containing a hierarchicalMenu and want to change the button text when refined. I can get the level 0 label for example “Aberdeenshire” but when selecting a level 1 item I still get just “Aberdeenshire”, when actually what I want is to display is “Blackford, Aberdeenshire”

My sandbox is here:

Thanks
Marcus

Just having another ask on this one, as I’m tearing my hair out trying to figure it out. Any ideas??

Thanks as always