I am not familiar with the English or Australian law, but I would have thought that if there was a dispute, and the probate was in England it would have been up to the English courts to sort it out, so I am leaning towards that Martha Taylor may have been in Australia when she died, there are 2 Martha Taylor's on the NSW Archive site who died intestate
Martha Taylor DOD 23 8 1884 Granville
Martha J Taylor DOD 16 7 1892 Petersham
Margp