I can't see a death date for this Benjamin or William Benjamin as he was registered when born.
Probate 26 Jan 1910 Plant William Benjamin of 27 Wrights Lane Old Hill Staffordshire died 24 December 1909 at the General Hospital Birmingham Administration Lichfield 26 January to Fanny Plant widow. Effects 126 13s
Looking at the Plant family this Henry/Harry I do not think is the son of Benjamin and Elizabeth Downing although he is stated as son on census. I think he maybe one of the girls illegitimate sons. ?? Could this be him? PLANT, HARRY GRO Reference: 1883 D Quarter in STOURBRIDGE Volume 06C Page 162