BRITAIN IRELAND SCOTLAND YOUNG PEOPLE WOMEN Margaret Heffernan RESULTS 2006 Ranking Worth Industry 14 £410m ( €603m) Retailing Heffernan, 64, is textiles director and the second-largest shareholder after her brother Frank (qv) in Dunnes Stores, with a stake worth £396m. She has given away a fifth of her share, totalling £100m. Beneficiaries are thought to be her children Michael, 36, the head of textiles, Anne, Andrew and Bernard. Other assets add £14m to her wealth. RESULTS 2005 Ranking 14 Worth 2005: £330m