Have you discounted this one from FamilySearch?

Name John James
Spouse's Name Martha Godsall
Event Date 09 May 1834
Event Place Ballingham, Hereford, England

Ballingham is about 9 miles from Whitchurch.

If I have the right entry in the 1841 census Martha was born c1811 and John c1796. They seem to have an eldest child (James) aged 4 which would fit the marriage date.