Complex sentence: It contains 13 listed buildings designated by English Heritage and included in the National Heritage List for England All are listed at Grade II, the lowest of the three gradings given to listed buildings, applied to "buildings of national importance and special interest".
Split into simpler sentences: It contains 13 listed buildings designated by English Heritage and included in the National Heritage List for England. All of these are listed at Grade II. This grade is the lowest of the three gradings given to listed buildings and is applied to "buildings of national importance and special interest".