Complex sentence: The line was mentioned as a candidate for closure in the "Reshaping of British Railways" report (The Beeching Axe) review, in 1963, but it was not closed by British Railways until 1970.
Split into simpler sentences: The line was mentioned in the Reshaping of British Railways report or the Beeching Axe review, in 1963. But the line was not closed by British Railways until 1970.