Re: White Star & Cunard.
the information I have in front of me says that the White Star Line was bought in 1926 by the Royal Mail Steam Packet which then went bankrupt in 1934 and sold the White Star Line to Cunard. The name White Star was retained until 1947, when the two shipping lines were taken over by the Cunard Line which is still operating today with the QE2.

If you read my post above I did state that the white star line was bought by Royal Mail Steam Packet until it went bankrupt in 1934
when it was taken over by Cunard so that makes it 1934 when cunard and white star joined which is exactly what i said

and this information was written straight from the documentation I have from a model of the titanic I am currently building the information I have is not limited to titanic and actually covers a wide range of sea voyage and transport as well as changes over time for sea travel