Carole - Firstly - thanks for your help.
Secondly - It's all very complicated - and we don't really understand whats happened ourselves, his life - and the life of most of my family back then appears to be fairly chaotic.
The facts as I know them:
I have Thomas in 1891 on the census - he is listed as one year old and as you say he is living with his Grandmother and his Mother (Mary-Ann).
In 1911 - he is a boarder at a house in Soho St in Liverpool and working as a Labourer.
On 5th Dec 1914 he gets married to a lady called Annie Walker.
In the same year (1914) he also joined the Merchant Navy where he serves until 1925.
He lived a long time at 11 Gerard Street - where he features on electoral registers from 1920, 1925, 1929-1930.
He has four children George in 1908, Margaret in 1912 (who dies in 1914), John in 1921 and Ellen in 1923.
His wife then passes away, also in 1923.
The last record I can find of him is another entry on the Electoral Register for 1934-35 - still living at 11 Gerard Street - but living with his mother and his brother William.
The next record is his death in 1977.
Another record I have is a New York passenger listing from 10/11/1919 where Thomas visits America - he gives his date of birth as 19th December 1890 and his birthplace as Liverpool.
Lots of questions and not many answers unfortunately.