New attractions at a Norfolk museum include a restored nuclear war reporting room, a Tornado cockpit, and a German aircraft cannon.
The RAF Air Defence Radar Museum, near Horning on the Broads, opens from Easter with a larger reception and shop area.
The once top secret radar establishment occupies the site of the world's longest continuously operating radar station and is the biggest museum in north Norfolk.
It will now be open Tuesday, Wednesday, Thursday and Saturday through to the end of the autumn half-term at the beginning of November.
Museum manager Gregory Hayman said: 'We have added another room to the existing 20 rooms meaning that we can have more exciting and interesting exhibits on display from our collection of over 10,000 items.
'We believe we have things of interest here for everyone, from those who served in the forces to people who want to know about the part radar played in the Battle of Britain and the terrifying reality of the Cold War and the threat of nuclear destruction.'
The museum has also improved its school offer, producing learning journeys and materials that will feed into more parts of the curriculum.
The nuclear reporting cell was formerly staffed by the Royal Observer Corp (ROC) and will have Geiger counters and fall-out protective suits on display. Meanwhile, the German Dornier 217 cannon was retrieved from the plane which was shot down by a crew from 68 Fighter Squadron, based at Coltishall, on the night of July 30, 1942 over Salthouse Marshes.
A Tornado cockpit joins the two other cockpits and will be housed with the Jaguar cockpit in the 'hanger room'.
This year the museum will be celebrating the centenary of the RAF, which was formed on April 1, 1918 and will hold three special exhibitions.
Meanwhile, sudent admission prices have been slashed from £9 to £5 and all children go free in April.
The museum is open from 10am to 5pm and is also open on Easter Bank Holiday Monday and the two May bank holiday Mondays as well as the summer one.
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