There's a Robert Martindale b c1892 with a Margaret Jane b c1892, Robert b 1916 and 1 other living in Felling, Co Durham [Gateshead district] in 1939
Also in Felling is a John Martindale b c1883 and Isabella and a William Martindale b c1888
John & Isabella are there in 1911 - he's b Egremont, Cumbria
Leads to this family
1891 - Egremont
Jonathan Martindale 36
Mary Martindale 32
Jane Martindale 10
John Martindale 8
Betsy Martindale 5
William Martindale 2
RG12; 4318, 68, 29
1901 - Benwell, Northumberland
Jonathan Martindale 44
Mary Martindale 42
Betsy Martindale 17
William Martindale 14
Robert Martindale 11 - b Aspatria
Mason Martindale 8
Joseph Martindale 5
Jonathan Martindale 1
RG13; 4778; 19; 29
Bit of guesswork though, so would agree the marriage cert is required