Kay99, is it possible that the Arthur Cuthbert on the birth cert was actually Arthur Denton and did Esther give a false christian name ?? also the Arthur Denton 1939 is lodging with his Aunt (or possible mother?) sister of Arthur John Denton
I think that the mother Esther got confused when she registered the birth as she was not married to Arthur Denton and therefore used her maiden name as their surname. If this was the case no idea where the name Beach came from
I also noticed a London School Admissions and Discharges Year Books that mention an Arthur Denton with the same birth date and father Arthur
Arthur Denton
Age 5
Birth Date 28 May 1894
Admission Date 3 Jul 1899
School Olga Street School Tower Hamlets
Father Arthur Denton