William Walton · 1902–1983 · British
| Composed | 1969 |
| Instrumentation | Not yet confirmed. We publish TBD rather than a guess — a wrong instrumentation is a hiring error that costs real money. |
| Duration | 16 minutes |
| Tier | Discovery — worth programming, rarely heard |
| Editions & hire | Oxford University Press ↗ |
| Source | William Walton Trust — Improvisations on an Impromptu of Benjamin Britten ↗ |