I found an interesting article online about unusual carvings in a medieval church:
'Forgotten' grotesques discovered in medieval church. But none of the articles on the subject talked about the approximate age of the carvings, or of the church.
To a local, I suppose it would be obvious whether the church was, say, Anglo-Saxon, or 15th century. I'd guess that kind of carving was more typical of the 13th or 14th century. I wish they'd said.