A death has to be legally registered in the UK before a burial can take place. For the majority of people, the reason they can't find a death is because they are looking in the wrong place. I had the same problem when looking for my own grandfather. He lived in the Greenwich/Eltham area of London all his life - he was a master bricklayer in that area, but I didn't have an exact year for his death. After obtaining my fourth (or was it the 5th ?) wrong certificate for him, I'd practically given up, then I made contact with a cousin on my dad's side that I'd not met before, and she told me that my grandfather went to live with his son in Hampstead when he became ill, and then was admitted to Hampstead Hospital, where he died. That's why I asked you if your ancestor had any children, because he may have gone to stay with them. Another possibility is that the death entry has been wrongly transcribed, but this is quite rare.