The deaths are listed in the GRO indexes, available through Ancestry, FindMy Past or FreeBMD .... not sure why you are not finding them.
On further inspection ....looking at ages in the index , the 1895 death appears to be an infant. The 1893 one was born about 1845, but is Henry William HEATH.
The 1896 Henry HEATH death entry has an age of 34 (b abt 1861/2), and the reference for Henley is Oct-Dec 1896 Vol3a p475. He would be the right age for an 1893 marriage, so may be worth getting the certificate (if that fits with your other information). There is a Henry HEATH in the 1891 census in Nettlebed of around that age (b abt 1864) shown as a servant .