Blenheim Palace has opened a temporary trail that tells the stories of the women who secretly worked for MI5 during World War II, marking the 85th anniversary of the security service’s relocation to the stately home.
The Women of Wartime – Secrets trail, which runs at the Woodstock estate until Sept. 30, invites visitors to take part in code‑breaking activities and to explore spaces used by MI5 personnel during the 1940s. The route will lead guests through the Flagstaff Gate, the Great Court and the Long Library to show how women contributed to counter‑espionage work while based at the palace.
MI5 relocated its headquarters to Blenheim Palace in September 1940 after its previous base at Wormwood Scrubs prison in west London was bombed during the Blitz. The move was one of several wartime dispersals of government services away from London as the capital came under sustained aerial attack.
Carmen Alvarez, collections and conservation manager at Blenheim Palace, said the trail would reveal little‑known aspects of wartime history and the “vital role” women played in the Allied effort. “The story behind MI5’s move to Blenheim Palace is a fascinating one — and this new temporary trail will be a revelation to anyone with any interest in wartime history and women’s vital role in the Allied victory,” she said.
Organisers say the trail combines archival interpretation with hands‑on elements, enabling visitors to engage directly with aspects of the work undertaken by staff at the palace during the war. The palace has also incorporated broader wartime facts into the trail, including that Blenheim was never bombed because Adolf Hitler reportedly wanted the estate for himself if an invasion of Britain had succeeded.
Historians have noted that many wartime intelligence operations relied on a large, often hidden workforce, including women who served in roles ranging from administrative and clerical duties to technical tasks such as code work and signals intelligence. At Blenheim, the exhibition aims to make visible the contribution of those whose service was shrouded in secrecy at the time and for decades afterwards.
The trail forms part of a wider public interest in uncovering and commemorating the contributions of women in Britain’s wartime institutions. By showcasing physical locations within the palace where MI5 personnel worked, organisers said the exhibition provides a tangible link to a period when the dispersal of government functions reshaped Britain’s wartime geography.
The Women of Wartime – Secrets trail is open to visitors on the Blenheim Palace estate in Woodstock until Sept. 30. The palace has advised visitors to check opening times and booking arrangements on its website before attending.