Complex sentence: A renumbering in 1927 saw the original forty were renumbered 5100 and 5111 to 5149, the next additions to the class filled in the numbers 5101 to 5110 and extended the class to 5189.
Split into simpler sentences: A renumbering in 1927 saw the original forty renumbered 5100, and 5111 to 5149. The next additions to the class filled in the numbers 5101 to 5110 and extended the class to 5189.