In hangars and machine shops the length and breadth of Britain a brave bunch of engineers and aviators are battling to keep the UK's most historic warplanes in the air. From Spitfires to C47 paratroop planes, Cold War jets to helicopters, the skies of 2020 are home to a growing fleet of antique warbirds – 20th century military aircraft rebuilt or even recreated from scratch.Now Warbird Workshop is climbing into the cockpit with the pilots and professional engineers committed to returning planes that fought and won wars to the skies. We'll watch as vintage engines are coaxed back into life and restorers puzzle out the problems presented by aircraft designed before their grand dads were born.And we'll capture the nostalgia and the drama of first test flights as iconic fighters like the Spitfire soar into the sky again after rebuilds that can take decades.