I have very little information about my paternal grandfather. His name was James Coffee and he and my grandmother, Lillian Annie Jacoby, had 4 children, I think, out of wedlock (James Edward Coffee Jacoby b. 1921; Reginald Leslie Coffee Jacoby b. 1922; Kenneth Ralph Coffee Jacoby b. 1923 and Peggy Joan Coffee Jacoby b 1927). The father is not detailed on any of their birth certificates except a crossed out James on that of James. From family recollections he worked at the public house on the corner of Euston Road and Sommerstown which I think is the old Rising Sun now known as The Rocket. He had a sister called Ada who either also worked at the pub or was the licencee.
Does anyone have any clues as to how I can move forward in my search as I am completely stuck.