Aye I'm a 43-year-old Geordie and I've never heard "Wor Hyem" from even the broadest of Geordies. "Gan hyem", "Wor hoose"...aye.
I honestly can't say I've ever heard any Gerodie say wor hyem like, wor hoose, wor lass, wor city, wor kid etc.
Call it Castle Flags
No-one gives a s*** I know but how can you grow up in Newcastle and never have heard anyone say "wor lass" or "wor kid"?
Think you've misread him like.
Honest story though, when my parents lived in Inverness, the staff thought my mam was called Wallace because my dad always referred to her as wor lass.