Hi Ned
Had a quick look at the MIs for Scartho Cemetary but the only Harry Kelly I could find died 10/02/1963 aged 50 but that doesn't mean your Harry Kelly wasn't buried there, there's alot of graves without headstones in the cemetary.
Had a look through some other MIs and came across this one but not sure if its anything to do with your Kellys
Cleethorpes Cemetary
Walker Moody Kelly died 24/09/1896 born 16/11/1867. Also Henry Kelly died 29/12/1909 born 14/01/1844. Also Ann Elizabeth Kelly, wife of Henry Kelly, died 11/04/1934 born 30/05/1848. Also Henry Kelly JP died 28/03/1939 born 13/12/1867.
This stone sacred to the memory of Annie Elizabeth Carter wife of walter Carter daughter of Henry and Anne Kelly who was born on the 4th day of January 1873 and died on the 29th day of December 1926.
Fiona