Generate a question which can yield the answer mentioned in the input. Generated question must be answered by the answer provided in input, without using any extra knowledge.
Q: Context : As demand for international rail travel declined and the shipping business became almost exclusively dependent on passenger and freight vehicle traffic, the ferry business as was incorporated as Sealink UK Limited in 1978, a wholly owned subsidiary of the British Railways Board (BRB), but still as part of the Sealink consortium.
Answer : British Railways Board
A:
What is Sealink's parent company?