A renowned businesswoman, her long career included boardroom roles at companies including Rolls-Royce, British Gas parent Centrica and chairman of the Port of London Authority.
Dame Helen was president of the CBI 2009-2011 and was chief executive of the Economist Group until 2008, having joined the company in 1985 and was managing director of the Economist Intelligence Unit from 1993 to 1997.
She was also deputy chair of the Hampton-Alexander Review into the representation of women in senior levels of business, and chancellor of the University of Southampton.
Paying tribute to Dame Helen, UBM executive vice president Michael Duck said: My everlasting wonderful 'photo' of her in my mind, was in Greece. We had attended the Posidonia exhibition in Athens. She had twin hats on that day as Chairman of UBM and our Maritime portfolio, and that of chairman of the Port of London Authority . We were invited to dinner at the magnificent rooftop restaurant at the Grande Bretagne Hotel overlooking the Acropolis during a balmy star filled sky. The Parthenon was luminescent and the moon full. The ex-King of Greece sat at the next table and Dame Helen was in her element holding court with ship-owners and diplomats alike. Conversations flowed like multiple rivers, I will always remember her smile and the twinkle in her eye........she loved life."
Dame Helen, who was married with three children, had been battling cancer for several years.