Datapoint Channel Islands English/Relativizer that or what in non-restrictive contexts

Variety: Channel Islands English
Feature: Relativizer that or what in non-restrictive contexts
Value: C - feature exists, but is extremely rare
Informants: Anna Rosen

Examples

Example 467:
My brother, that died, he led the bull around.
Example 468:
Well, my mate, that lives up the road there, his wife, she's a secretary there.