<p>As a child, John Brennan wasn't an obvious candidate for success. School was a difficult, upsetting place and he was always at the bottom of the class. His battle with dyslexia meant that he felt stigmatised by a society that didn't understand him. Yet his determination to not be defined by his dyslexia created an ambition that has been matched by his business acumen.<br>Now in his mid-fifties, John's optimism is still flowing. It is a measure...