A
At home in NZ
Guest
It is not only England, it seems to be common among the English speaking nations.surnames separated with a hyphen are a fairly recent innovation in England, so it's likely to be more of a problem for the researchers of the future.
I have a case in point. My grandson has a hyphenated last name, his father's last name - mother's last name.
'because it sounds better that way'.
His mother has chosen the same for her married name, therefore poor dad is the only one with a single last name which would not be carried through future generations but for his two brothers who have sons with the single last name.