Designed by W.E.W. Petter. His previous designs, Westland Whirlwind and Welkin had narrow wings, which caused problems, hence the broad wings for the Canberra.

Designed by W.E.W. Petter. His previous designs, Westland Whirlwind and Welkin had narrow wings, which caused problems, hence the broad wings for the Canberra. https://en.wikipedia.org/wiki/W.E.W._Petter https://en.wikipedia.org/wiki/W.E.W._Petter