I understood from an Ancestry tree that Edith Emma Stoner (birth registered Horsham, mid-Sussex 4Q1889) married in Karachi to Alfred Harrison. (Search on Edith Emma Stoner 1889 Horsham).
The reference given is "Holy Trinity Church. In 1914 Karachi was in India prior to the country being partitioned. Wedding source - Page 78 GRO Index Army Marriages 1881-1915 and copy of marriage certificate."
The Edith who married William George Tranter on 28/9/1913 was the daughter of Rosa Stoner (registered 1Q1888 Midhurst, West Sussex) the same district as the marriage.
I do not know which Edith M Stoner (there were many and more 'married in and became Edith M Stoner) married Frank Harrison in 1945 in Brighton RD. A guess would be Edith M birth 2Q1920 Brighton. There was a Brighton death of Edith Mary Harrison in Nov 2005, dofb 17/3/1920.