Complex sentence: Turner defended the actions of the regulator on the BBC's Andrew Marr show on 15 February 2009, saying that other regulatory bodies throughout the world, which varied in structure and lightness of regulatory touch, also failed to predict the economic collapse.
Split into simpler sentences: Turner defended the actions of the regulator on the BBC's Andrew Marr show on 15 February 2009. His comments were that other regulatory bodies throughout the world, which had a variety of different structures and which are perceived either as heavy touch or light touch also failed to predict the economic collapse.