Ex-Guardian editor Peter Preston dies aged 79

The former long-standing editor of The Guardian, Peter Preston, has died aged 79.Mr Preston's 20-year editorship of The Guardian spanned the Thatcher and Major years from 1975 to 1995.During that period, his left-leaning newspaper exposed the cash-for-questions affair and carried out the investigation that led to then-Tory minister Jonathan Aitken first losing his job and later being convicted of perjury.