My personal Sherlock head canon
DI Lestrade is probably 45 years old, so that puts his birthday at 1967. His mother probably had him when she was 28, which puts her birthday at 1939. Her mother probably had her when she was 30, which puts her birthday at 1909.
Riddell and Nefertiti went back to explore the African plains in 1902 after their stint with the Doctor; they stayed with each other for 7 years, until Nefertiti got pregnant and had a baby girl (she passed away while giving birth). Riddell moved back to England and raised her and eventually saw her get married before he died. She got pregnant in 1939, right before her husband went to fight in World War II; he died during battle, leaving her to raise their daughter all by herself. The baby (a girl) was born later that year. She grew up, got married, and had a child - Gregory Lestrade - in 1967. He grew up to become Detective Inspector at the New Scotland Yard in 2012.
What do you guys think?
Riddell and Nefertiti went back to explore the African plains in 1902 after their stint with the Doctor; they stayed with each other for 7 years, until Nefertiti got pregnant and had a baby girl (she passed away while giving birth). Riddell moved back to England and raised her and eventually saw her get married before he died. She got pregnant in 1939, right before her husband went to fight in World War II; he died during battle, leaving her to raise their daughter all by herself. The baby (a girl) was born later that year. She grew up, got married, and had a child - Gregory Lestrade - in 1967. He grew up to become Detective Inspector at the New Scotland Yard in 2012.
What do you guys think?