Well I'm considerably ahead since I first posted about the Lloyds.
I have found 5 of their 8 children and have found census records for them. I have also found Ada which is excellent. I still cannot discover where David Lloyd is in 1901 and 1911 but as it's such a common name and the surname seems to be transcribed incorrectly quite often I may not.
David Lloyd - found in 1871, 1881 and1891
Ada Davidson Lloyd nee Owen(s) - found in 1871, 1881, 1891, 1901 and 1911
Reginald Victor Lloyd born about 1885 - found in 1891 and 1901
David Irving Lloyd born about 1888 - found in 1891
George Richard Evan Lloyd born about 1890 - found in 1891 1901 and 1911
Jessie Lilian Lloyd born about 1895 - found in 1901 and 1911
Frederick Cairns Lloyd born about 1899 - found in 1901 and 1911
In 1911 Ada said that she had 4 children still living so that would be Reginald, George, Jessie and Frederick.
I think I have found Reginald in 1911 but I'm still not sure it's him. I did find him though on a passenger list in 1934 with a wife Mary. He is listed as being a tourist agency manager.
So David Irving Lloyd born about 1888 has died. One possible I found was in 1901 Q4 8A 302 Wirral - David Ervin Lloyd - age 14.
Thank you everyone for your help.
mab