Not doing well, so couldn't get back to this til now (despite it now being 'old history' on here).

Can't recall ever seeing a squirrel with this type of markings before (the red/rust ears, arm tops and sides of the belly).
Based on the ears, that looks like a british red squirrel to me.

Quite adorable, really.
They are adorable. It is odd, though, the one you posted does, indeed have red all over, while the one that I'd found/posted has the red in such specific areas (ears, arm tops, and stripes down the side of its belly only). That was the main thing I found unusual (and 'unusually pretty'), the 'isolation' of the color with the white sides and back.