St David's church was located at the north end of what is now Old Church Lane. It is portrayed on the first-edition Ordnance Survey 25-inch map of the area (1880) where it is depicted as St David's church but also annotated 'School (Boys & Girls)'. By 1900 it is shown as 'Mission Church' as it also is in the 1920s. It may have continued as such into the post-War period as it depicted on the fourth-edition six-inch plan (1938-45).
Sources:
Ordnance Survey County Series 25-inch map: sheet Monmouthshire XXII.14, editions of 1880, c.1900 & c.1921.

David Leighton, RCAHMW, 23 November 2015