An extra set of gates were added to Cromwell lock in 1935, effectively creating a second lock, while the Lenton to Trent Lock section was leased from the LNER in 1936, and ultimately purchased in 1946.
Engadiuse un conxunto extra de portas á esclusa de Cromwell en 1935, creando efectivamente un segundo bloqueo, mentres a sección de Lenton a Trent Lock foi alugada a LNER en 1936, e finalmente mercada en 1946.