Thomas Chapman (b 1899) would become 18 yrs old in July 1918 which made him qualify to be conscripted into WW1.
There is a military record for him on Ancestry. He served from 17th Dec 1917 to 17th Jan 1919 in the Royal Naval Volunteers Reserve stationed on Tyneside. In that time he served on the HMS Victory VI between 21st May 1918 to demob on 17 Jan 1919.

You will find his marriage on Free BMD in Q4 1921 to Dora Blythe. Use Free BMD also to find his children of that marriage (mmn Blythe).
The family is on the 1939 Register
Use Free BMD to find his death.

Do you have Lillian's exact birthdate?

Dave

Vera Bennett, baptised 7 October 1908 at Christ Church, Heeley, Sheffield.
Parents, Joseph and Harriet of 36 Gregory Road, Sheffield.

In 1911, the family are living at 48 Sherrington Rd, Sheffield. (Sharrow Ward).

Found the family too on the 1911 census but there was no older sister called Alice.

I think we need the definite article on who Mr Robinson knows is 100% and thenstart working back because I think at the moment it looks like we could be going down the wrong path.

Debra
You said " My reason for exploring this is that it may be possible that 1 of Vera’s sons may be Lilian’s father.."

Vera was 2 years old when Lillian was born. They were cousins
Dave

PS Great find Sally. Definitely the right family.

Hi,
Lilian was born 14 July 1918.
Thanks