Complex sentence: The building was judged to need repair work by the 19th century, and was much restored in 1855 to designs by G. E. Street; this work included building the north aisle and adding a spire to the tower, which dates from the 1730s.
Split into simpler sentences: The building was judged to need repair work by the 19th century, and was much restored in 1855 to designs by G. E. Street. This work included building the north aisle and adding a spire to the tower, which dates from the 1730s.