Did her husband serve as a Stoker in the Royal Navy in WW1?
I've found the following birth regs for the children :
William Sept Q, 1904
Joseph March Q, 1909
John March Q, 1911 - died Sept Q 1911
Elizabeth Dec Q 1912
Jessie Sept Q, 1917
Christina March Q, 1920
If John died in 1911, then this photo could possibly be the two older boys and Elizabeth
Gadget