I am not aware of a George Thompson owning or operating a shipbuilding concern in Belfast or indeed Northern Ireland for that matter. I can confirm however that Harland and Wolff built a number of vessels for George Thompson & Company shipowner however the "Hawkaway" was not among them. As Timothy has previously pointed out Thompson sold his interest in his company to White Star. All the vessels constructed for Thompson were motor ships of which some were owned jointly by White Star and Shaw Saville Line, a rather unusual arrangement to say the least.
It was like that when I got here