Arthur Benjamin’s work is characterized by late-Romantic lyricism with a sophisticated harmonic language. It uses expressive melodic arches to evoke a sense of quiet introspection.
Mastering the independent shaping of the melodic line over the harmonic accompaniment is essential.
Comparable difficulty and character — good candidates for what to learn next.
Before Dawn is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7. In the RCM system it corresponds to about level 7.
You should be comfortable at Henle level 5 — meaning you can already play level 4–5 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
A typical performance of Before Dawn lasts about 5 minutes.
Before Dawn is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.
Pieces at a comparable difficulty and character include At Twilight by Zdeněk Fibich, Berceuse by John Ireland, Berceuse, H.8d by Frank Bridge — see the full similar-pieces list on this page.