Rupert Murdoch, Media Bias and the Phone Hacking Scandal: Prior to 1964 the Sun was called the Daily Herald. It was a trade union paper. In the 1930s it was the most widely read daily newspaper in the world. It was fiercely left wing. As a consequence it struggled to get advertising revenue. Over the years its cover price began to rise relative to the right wing press. Slowly its readership dwindled and in 1964 it was renamed the Sun. In 1969 Rupert Murdoch bought it, profoundly shifting its editorial policy in the process.
Thus Britain’s most left-wing paper became its most right-wing paper overnight.