This is not a museum, but a hangar attached to a working RAF base, where the Memorial Flight is housed and serviced. Visitors are free to wander round an adjacent display area giving historical information and a gift shop with a comprehensive selection of gifts & books (No cafe, just a couple of vending machines). However, to see the collection itself you must be accompanied by a guide and do the hangar tour, for which there is a small charge. Tours go off at about half hour intervals and it's the luck of the draw as to whether you are in a small or large group. Our guide was excellent and informative. At one end of the hangar we saw a Dakota, with a Lancaster as the climax of the visit at the far end. In between was a Hurricane and a selection of Spitfires, showing how the design developed over time. The tour takes you down one roped off side of the hangar as some of the planes were being worked on. At my age standing for long periods can get painful and that was the only downside to the visit. There were a couple of chairs at very spaced out intervals but basically you have to stand for quite a time as the guide discusses the technical specs and the interesting history of each aircraft. Great to see that the memory of those who gave their lives, and the ingenuity of our engineers and scientists, is being commemorated by the preservation of these planes in working order.