Shorts submitted the twin-Merlin S.38 Sturgeon as their tender to S.11/43, while Armstrong Whitworth proposed the twin-Merlin powered AW.54.
In response to the tender call from S.11/43, Shorts submitted the twin-Merlin S.38 Sturgeon as its proposal, whereas Armstrong Whitworth proposed an alternative solution with the twin-Merlin powered AW.54.