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Rosaleen Blair

Dublin woman Rosaleen Blair (54) set up a nanny recruitment business in her home city before moving to the UK to work with former BBC Dragon, James Caan. She set up a new division at his company, Alexander Mann Solutions, which she later bought out. Blair subsequently sold it for €315m in 2013 and continued to run the company. It is believed that she retained a significant stake in the company which was again sold last May for £820m (€929m) to Canada's Omers Private Equity. On this basis, we are conservatively increasing her wealth estimate by €17m.

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