Complex sentence: By 1970 the congregation had fallen to the point where it occupied only a few pews, but there was later an increase in numbers and this gave rise to the full church and galleries of today, and numerous professions of faith.
Split into simpler sentences: By 1970 the congregation had fallen to the point where it occupied only a few pews. There later an increase in numbers and this gave rise to the full church and galleries of today, and numerous professions of faith.