It looks to me as though Mary Eliza Hall was prev married to George Weston. John William Hall was the son of John Hall who is turn was Mary Eliza's second husband, after George Weston died.
So taking Mary Eliza as our index, that would mean the grave occupants were:
Mary Eliza (index)
George Weston (first husband)
John Hall (second husband)
John William Hall (stepson)
Ernest Frederick Wright (haven't looked into him)
Is there any reason why this should be more complicated than that?
It appears to be a lot more complicated than that unfortunately

As per my opening post and what I now know :-
Mary Eliza Hall ( 9 Richard Street, as previous replies to this thread show she did marry a John Hall but I don`t know who that John Hall was or if he is related at this stage, its not the John Hall buried in Gilroes though ).
John Hall ( formerly of Buckminster Road , I have his death certificate confirming residence, he was my Great Grandfather, he married twice, his first wife was Mary Ann, his second wife was Sarah Elizabeth).
John William Hall ( also formerly of Buckminster Road, he was the first son of my Great Grandfather John Hall mentioned above with his first wife Mary Ann, I have probate details confirming his address and the name of his wife. )
Now the conundrum.........why are Ernest Frederick Wright ( as Alan Boyd has kindly confirmed is Mary Eliza`s younger brother ) and George Weston ( Mary Eliza`s first husband ) also buried there?? I intially discounted them because they died in 1923 and 1910 respectively and Gilroes were telling me the grave was purchased part used, I assumed they were in the plot when it was purchased.
Please excuse the pun but the plot thickens.................hope I have managed to explain things as they stand at present.
Steve