Andrew Behan has kindly carried out some research on this man:
Private Thomas Henry Tucker was born about 1897, the son of John Henry Tucker. His father was a Hall Porter. His mother died and his widower father remarried on 11 November 1905 to Rosanah Louisa Jane Plummer at St Saviours Church, Paddington and the family were living at 125 Kilburn Park Road, Paddington. The 1911 census shows them living at 171 Kilburn Park Road, Paddington and he was a 14 years old Telegraph Messenger at West End Lane, Kilburn. In May 1913 he was appointed as an Assistant Postman in the London Postal Service and promoted in September 1916 to the grade of Postman in London’s Western District Office.
He enlisted in the army at Bloomsbury and initially served in the East Surrey Regiment, service number 5296. He was later transferred to the 9th Battalion Lancashire Fusiliers, service number 41335, before moving to their 11th Battalion. He was presumed dead on 20 April 1918, aged 21 years, and is buried in the Cabaret-Rouge British Cemetery, Souchez, Pas de Calais, France and whilst his headstone has been erected at Plot XX.B.22 it bears the inscription ‘Buried near this spot’. On 19 June 1919 his father received his effects of £7-17s-3d together with a War Gratuity of £8-10s-0d. He was posthumously awarded the British War Medal 1914-1918 and the Victory Medal.
