Webb's 4-cylinder compounds of the Jubilee and Alfred the Great classes into 2-cylinder simple engines by George Whale, later continued by Charles Bowen-Cooke.

Unusually for the LNWR, the parent classes also had logical number series.

In 1920, locomotive 1914 Invincible was renumbered 1257, and the number 1914 was then taken by the Claughton Class war memorial engine 1914 Patriot.

The London, Midland and Scottish Railway (LMS) acquired 56 Renowns in 1923.

The LMS allocated these numbers in the 5131–5186 series, listed according to date of rebuilding, though not all numbers were applied before withdrawals started in 1928.