When there appeared to be a threat from German high-altitude bombers, the Westland Welkin was developed. This was a twin engine design with wide wings () to be able to intercept at . The threat never materialised and Welkins did not see combat service. A contemporary design the six cannon armed Vickers Type 432, which itself descended from a requirement for a fighter with 40mm cannon, got no further than the prototype.
When there appeared to be a threat from German high-altitude bombers, the Westland Welkin was developed. This was a twin engine design with wide wings (): to be able to intercept at . The threat never materialised and Welkins did not see combat service. A contemporary ,design! the six cannon armed Vickers Type 432, which itself descended from a requirement for a fighter with 40mm cannon, got no further than the prototype.