British Rolls-Royce, whose biggest business areas are energy and plane engines, achieved a profit of GBP 40 million before financing and taxes related to marine activities, a significant decline compared to the GBP 100 million result in the same period last year, according to the industrial group's interim report, published Thursday.

Management expects a 15-25 percent lower full-year result for 2014 due to a weaker market, a one-off impairment and a change in revenue composition.