Hi Paul,
Formally, unparished areas don't have a name. They often cover wide areas containing many settlements, making it difficult to imagine a sensible name for the whole area. Sometimes they are created by the abolition of a civil parish, so I guess the name of that could be carried over. But in any case the boundaries of a settlement in the UK are notoriously vague - pick a point between two villages and ask a sample of people "where am I?" and you are unlikely to get a clear consensus unless it's "somewhere between A and B."
Regards, Colin