Ondra Partners, the independent advisory firm, has posted double-digit rises in revenues and profits in its latest annual results, with mandates for clients including The Economist Group, Groupe Casino and Fairfax Financial helping to lift its performance.

The firm's revenues during the 12 months to March 31, 2016, rose by 20.5% from a year earlier to £36.4 million, according to documents seen by Financial News and recently filed with Companies House.