A former Coutts banker named as one of WealthBulletin's rising stars, Nathalie Dauriac-Stoebe, has launched a boutique multi-family office, Signia Wealth, backed by some of the City of London's best-known investment gurus and entrepreneurs.

The boutique's advisery board will be headed up by some impressive names - private equity veteran Jon Moulton, the former chairman of Morgan Stanley's equity capital markets business in Europe, Dante Roscini, property tycoon Stephen Vernon and Fitness First gym chain founder Michael Balfour, who will all provide strategy and guidance.