However , loss of a major sponsor in 1990 meant that only one car could be run , which was raced by Robb Gravett who became champion .
Gravett went on to become runner up in Group A , but Smith struggled with his recovery from the helicopter crash .
Loss of a major sponsor in 1990 meant that only one car could be run , which was raced by Gravett   who became champion .
Gravett went on to become runner up in Group A , but Smith struggled with his recovery from the helicopter crash .