In 1931, Spartan Aircraft's operations were allied to the Saunders-Roe company in which Whitehall Securities had taken a majority shareholding; then in April 1935, Whitehall Securities and Jersey Airways (formed by Walter Thurgood on December 9, 1933) formed United Airways as a sister airline to Spartan Air Lines.
In 1931, Spartan Aircraft's operations were allied to the Saunders-Roe company in which Whitehall Securities had taken a majority shareholding; then in April 1935, Whitehall Securities and Jersey Airways (formed by Walter Thurgood on December 9, 1933) formed United Airways as a sister airline to Spartan Air Lines.