Hi again
I am not certain if the periodicals can be referred to as newspapers. On Google Books they were coming up as magazines. Also Anglican Church records for Trinidad and Tobago are not available online. So given your hesitancy to go to Trinidad and Tobago or to have someone search it out for you, I don't know what more you can do unless there are some sort of duplicate records in the UK. Is it possible that you may get the information for which you seek from a will? Maybe of another sibling? Wish you the best in your search.