Thank you for your reply Valda.
On the 1901 census his parents, Henry and Florence Cullen, were living in Brighton. Henry was a coachman (not domestic) - what would (not domestic) mean, please?
By 1911 they were living at Churchover, Rugby and Henry was still a "coachman".
On the birth certificate it states that Bob's father, Robert, was born on the 8.10.1909. The date of Registration was 22.11.1909, which is more than six weeks by 3 days.
I have the school records for Churchover Parochial C of E School. They state that Henry's oldest child started school 26.1.1910 and that his last school was St Peters, Eton Square. also listed as Lower Belgrave Street. I cannot find any trace of them living in the Eton Square area, unfortunately.
I would still like to find out if there are any Street Directories around 1909 for the area around Wallis's Yard because I think that they were staying with Henry's mother (Eliza Blanks) at that time.
Thank you for the interest that you have shown.
Regards epc