Chief executive Warren East said: "After a challenging first half, we had a good end to 2019, delivering 25% growth in full-year underlying operating profit and an encouraging level of free cash flow. "Our restructuring efforts gained momentum, with run-rate cost savings of £269 million. "Civil Aerospace improved its underlying profit significantly, with record engine deliveries. "We made further progress on the Trent 1000; cash costs are in line with guidance. "We remain on target to reduce aircraft on ground to single digits by the end of the second quarter of 2020." Over the past 12 months, the company has been making progress in developing new more environmentally-friendly aero engines, including electric and hybrid-powered technology. The firm has recently started making parts for a brand new engine called the UltraFan, which Rolls-Royce claims will offer a 25% fuel reduction compared to the first generation of Trent engine, and deliver the same percentage reduction in emissions.