Previous marriage for Elizabeth was to a Benjamin Carr
(From 1911 census)
https://www.familysearch.org/ark:/61903/1:1:X7RT-78HIn view of the fact Elizabeth lived with Arthur for at least 10 years before she married him, I wonder if her first marriage is 1901 Dec qtr, Scarborough. (Even though recorded with Benjamin as wife in 1901)
A death for a Benjamin Carr that might work.
Carr Benjamin 53 York 9d 50 March qtr 1914
In view of their location 1901 & 1911
And from 1921
I think this is Mary’s birth reg, no mothers maiden name
PEACOCK, MARY -
GRO Reference: 1900 M Quarter in HELMSLEY Volume 09D Page 472