There were also problems with the design itself. Experiments with stainless steel construction on the Bristol 188 had demonstrated this material was much more difficult to work with than expected. Further, the Navy was planning a new series of smaller ships, and Blue Envoy would be too large to be carried by them. Having originally developed the Seaslug to fit smaller ships, its development into a system far too large for many designs made the Navy wary of another large design. And both the Navy and RAF were watching the shift from high-altitude bombers to lower-altitude strike aircraft, where the massive performance of the Blue Envoy would not be particularly useful as the radar horizon might be on the order of .
