Marcus ... what was the address on the death cert, and the cause of death ?
As yet I've no record of James H***** as a sugarhouse labourer at either Lyles or Tates (they did not amalgamate until 1921), and no employee lists have survived for either refinery. The death cert is probably the only surviving record of his employment there.
Neither of the books recording the histories of the companies mention fatalities as a result of the Silvertown Explosion. Damage at the refineries was minimal considering their proximity to Brunner Mond, and knowing what was manufactured there most workers left the refineries sharpish as soon as the fire began.
Considering the info in your previous thread along with the 1911 census, have you followed up on James John Holland born Croydon 1882 ? (The other James Francis Hollands Croydon 1881 married Maud Hart 1906).