I was comparing the most recent Kershaw Hereditary Peers list with my own notes, and discovered that he has listed an heir for this barony, which previously had none.
As shown in Kershaw, the heir is the son of the present Baron, the Hon. Magnus A.E.R., b.c. 2018.
The son and his sister are twins, listed here in a post by David Beamish, as part of a thread late last year.
With the birth of the Hon. Magnus, the barony is no longer heirless.
Brooke