Possibilities?
Births, September qtr 1914
Oldham Registration District vol 8d, page 1196
Pickering, Marjorie E Mother's Maiden Name: Whitehead
Births, December qtr 1915
Oldham Registration District vol 8d, page 972
Pickering, John Mother's Maiden Name: Whitehead
Births, September qtr 1919
Oldham Registration District vol 8d, page 1246
Pickering, George Mother's Maiden Name: Whitehead
And, Marriage, March qtr 1915
Oldham Registration District vol 8d, page 785
Pickering, John
Whitehead, Ada
Not saying these are all your family, but they could do with investigation?

Beat me to it, Heywood!!