Remind me...
- is the isolator within 2m of both appliances?
- must you absolutely have a single isolator?
Otherwise why not run 2 cables off 2 isolators off 1 circuit labelled as radial (re no topology confusion to the cognitively challenged)?
You could mount two 1G 32A isolators side by side in a "huddle" which would look ok. I would use independent 47mm deep backboxes (rather than 1G+1G) because 6mm FTE is a bit boistrous when cornered in a box unless you catch it by surprise. It adds cost of course, just a thought.
Someone on Ebay does a faceplate engraving service for =A32 as I recall, considering how some wiring accessory legends "scratch off if a knat exceeds ODPM speed limits and impacts".