One of football's most charismatic managers, the former Nottingham Forest and Derby County boss - who died on 20 September at the age of 69 - was also one of the most successful. John Motson reflects on his career and achievements, which include winning two league championships and back-to-back European Cups, in the company of Martin O'Neill, Bobby Robson, Arsene Wenger, Geoffrey Boycott and Michael Parkinson.