In earlier times The Carnegie Medal used to have “commended” and “highly commended” books each year, as well as a winner—I do not think it does now.

Rosemary Sutcliff was awarded the medal in 1959 for The Lantern Bearers. But she was several times commended too. In:

1954 for The Eagle of the Ninth
1956 for The Shield Ring
1957 for The Silver Branch

And highly commended in:

1971 for Tristan and Iseult