Sharon, I don't have many enlightening details, I'm afraid. It was something that came up in conversation.
The Persian in question was friendly, jumped for head rubs and pottered around the housing estates by Long Meadow Way, where my cousin lives. So according to googlemaps about a mile from Sturry? Local children recognised it/her, or at least called her by a name, and while straggly, she wasn't obviously stray.
Shall I point the cousin in the direction of this thread or your website+phone number? She might know a bit more, but if she had got a reply from the collar notes, I don't think she would have considered getting her chip-checked by a vet.