The UnionCastle Line was a British shipping line that operated a fleet of passenger liners and cargo ships between Europe and Africa from 1900 to 1977. It was formed from the merger of the Union Line and Castle Shipping Line.

It merged with Bullard King and Clan Line in 1956 to form British & Commonwealth Shipping, and then with South African Marine Corporation (commonly referred to as SAFMarine) in 1973 to create International Liner Services, but maintained its separate identity throughout. Its shipping operations ceased in 1977. SOURCE: Wikipedia