Over 40 years after the QE2's launch, the world's longest-serving cruise ship is set to embark on her final voyage. This celebratory film hops aboard to pay tribute to the much-loved ocean liner as she glides gracefully towards retirement. As well as exclusive footage of the trip, there's a look back over the vessel's glittering history, from humble beginnings on the River Clyde to her status as a British icon. 2/7.