 Thus 2803 became 1603 at rebuilding in October 1946; 2807 had already become 1607 (December 1946) prior to rebuilding in May 1947; and 2814 (rebuilt November 1946) became 1614 in December 1946.Between 1948 and 1950, British Railways increased these numbers by 60000; no.61644 was so renumbered at the time of its rebuilding in March 1949.