Four Irish make Forbes mega rich list

Bill Gates gained ground at the top of the mega-rich rankings as the world's wealthiest people added $400bn (€337bn) to their net worth, according to Forbes magazine's latest annual list.

The number of people whose wealth reached 10 figures stood at a record 793, an increase of 102 from the previous year, with Microsoft founder Gates in first place for the 12th year in a row. His $50bn (€42bn) fortune marked an increase of $3.5bn (€2.9bn) from the 2005 Forbes list.