The only surviving Second World War operation room is offering a rare chance to go inside and see the work of the everyday individuals that changed the course of the war.

Bury St Edmunds Guildhall will hold the free event on Sunday, August 18, to give visitors an insight into the operations room, as it was, with guided anecdotes and fascinating stories.

The open days are free, offering visitors to see an almost 100-year-old time capsule (Image: Rebecca Austin)

The Guildhall's operation room was home to the Royal Observer Corps, a group who were the "eyes and ears of the RAF" during the Second World War.

Many farmers worked for the Corp, as they could identify planes by sound easily (Image: Bury St Edmunds Guildhall) The Corps, made up of everyday people, operated by identifying planes by shape and sound then reporting the findings to Bomber Command.

Katie Everard, heritage officer at the Guildhall said, "As a site of profound historical significance, the Observation Room offers an invaluable window into the past, capturing the courage, dedication, and resilience of the ROC during some of the most tumultuous periods of the 20th century."

The Royal Observer Corps, established in 1925, played a crucial role in the defence of the United Kingdom during World War II and the Cold War.

The observers were key in the war effort, working 24/7 to ensure aircraft were plotted correctly (Image: Bury St Edmunds Guildhall) "The Observation Room at the Guildhall stands as a testament to the vital work carried out by the ROC volunteers who monitored the skies for enemy aircraft.

"Their vigilance and commitment were instrumental in safeguarding the nation, making this site an enduring symbol of civilian contribution to national defence.

"The Bury St Edmunds Guildhall invites you to visit the Royal Observer Corps Observation Room during one of our free Open Days and experience first hand the remarkable history it preserves."

Re-enactors will be in full uniform on open days to immerse visitors in the experience (Image: Greg Brown) The open day is free, telling the stories of those working at the Guildhall during periods of national uncertainty.

The event will take place on Sunday, August 18, between 10am and 4pm. Donations are welcome.