Engineering firm GKN has said it lifted annual profits as it continues to benefit from a recovery in global car production.

The Redditch-based company, which makes drive shafts for almost half of all new cars, reported a 4% rise in pre-tax profits for the year to December to £601 million - a performance in line with forecasts.

It said global car production increased 3.1% to 87.4 million vehicles, boosted by rises in output in China, the US and Europe.

GKN, which has around 10% of its 50,000 strong workforce in the UK, said its commercial aerospace unit grew by 4% while its military aircraft sales were broadly flat.

It added that sales at its Land Systems business were 10% down due to challenging agricultural equipment markets.

The engineer forecasts growth this year, with global light vehicle production set to lift by around 2% following increases in China and the US and flat output in Europe.

It forecasts commercial aircraft production will be strong, although military markets will decline.

Its aerospace business makes fuselage, fan blades and cockpit windshields from sites including Yeovil, Luton, Derby, Portsmouth and the Isle of Wight.

The group expects sales at its Land Systems unit will be lower in 2015 than last year as lower agricultural sales will offset a slight improvement in industrial markets. It adds this unit will undergo a £8 million restructuring charge in an effort to reduce costs.

The group's statutory pre-tax profit fell 54% to £221 million, although £232 million of this relates to foreign currency movements for forward contracts.

Chief executive Nigel Stein said: "We have continued to outperform our key markets and report good underlying financial results in spite of sterling's strength and some end market weakness, particularly in Land Systems.

"Looking forward we expect 2015 to be another year of growth."

Shares fell 3% today as Cantor Fitzgerald broker Andy Chambers added: "The outlook for the current year errs on the side of caution in our view."