Complex sentence: Mr Allen now holds a high profiles range of directorships and media roles However over 20 years ago was criticised as having too little media experience to have taken on the monumental role of chief executive of Granada.
Split into simpler sentences: Mr Allen now holds a high profiles range of directorships and media roles. However, the irony is that over 20 years ago he was criticised as having too little media experience to have taken on the monumental role of chief executive of Granada.