Gallagher - Rodgers
I am looking for info about my grandparents, birth, baptism and/or death dates

.
Only info I do have is as follows:
My Fathers birth certificate: Name: Robert Frederick John Rodgers born 21 Jul 1931
Father: Robert Frederick Rodgers
Mother: Kathleen Rodgers formerly Gallagher.
Grandparents marriage certificate: 7 Dec 1929 Long Tower Church, Derry
Robert Frederick Rodgers Full Father: John Rodgers
Kathleen Gallagher Full Father: Unknown
1929 has Robert listed at Ebrington Barracks, Londonderry.
1930 has Robert and Kathleen listed at Pontefract Barracks, Yorkshire.
Any info would be greatly appreciated.