Helliwells Ltd was a British engineering company. The company was founded in Dudley in 1889 as a manufacturer of fireplace accessories. It branched out into the automotive and aerospace sectors as these experienced growth in the early 20th century. In 1939 it established a factory at Walsall Aerodrome which it used during the Second World War to adapt the American-made A-20 Havoc/Boston to British standards and to refurbish Spitfire, Seafire and Harvard aircraft.
In the post-war years Helliwells purchased Swallow Coachbuilding and from 1946 to 1951 produced the Swallow Gadabout motor scooter and prototypes of the Triumph TR-X motor car. Helliwells was purchased by Tube Investments Group in 1950 and from 1954 to 1955 produced the Swallow Doretti luxury motor car. Helliwells was renamed TI Hollow Extrusions in 1985 and, after its sale to the former managing director of Reynolds Tube, was known as Hay Hall Tyseley. The company was dissolved in 2011.