Just back from Fochriw cemetery. Have found all the Carter graves, including John Henry (1862) and his wife and some of his children. Have photo's.
Not entirely sure about Mary Ann, the headstone does not say if she is buried with George and the children.
I also believe I have found why we could not find a birth registration for Annie. Annie is buried with George, and shown as his daughter. However George died 10th Feb 1883 whilst Annie was buried 9 Dec 1886 at age "2 years and 3 months". This would mean her birth date would have been around August 84 (about 20 months after George died). Was John Jenkins her father?