Complex sentence: Also in later years the parish had a blacksmith's shop and a post office but both of these are now closed: the post office being the last to close still has an in-use postbox but is now just a house on the inside.
Split into simpler sentences: Also in later years the parish had a blacksmiths and a post office but both of these are now closed. The post office being the last to close still has an in-use postbox but is now just a house on the inside.