English Heritage has today (16 September) unveiled a blue plaque to Christine Granville, the Polish Second World War special agent who Winston Churchill once called his "favourite spy". The new plaque marks 1 Lexham Gardens Hotel (then the Shelbourne Hotel) in Kensington – the hotel was Granville’s London base after the war, in the centre of the city’s post-war Polish community.

Christine Granville was Britain’s first and longest-serving female special agent during the Second World War. Born Krystyna Skarbek in Warsaw in 1908, she joined British Intelligence after Germany invaded her home country in 1939. "A flaming Polish patriot, an expert skier and great adventuress" was how her recruiting agent described her and Granville served with distinction in three theatres of war – Eastern Europe, the Middle East and Western Europe. Throughout the war, she went by many aliases but early in the conflict she was issued with a British passport in the name of Christine Granville and she later wrote, "I want to keep the name Granville that I have made for myself, and of which I am rather proud". Her successful missions included skiing over the snow-bound Polish border in temperatures of -30°C, smuggling microfilm across Europe which proved Hitler’s plans to invade the Soviet Union and rescuing French Resistance agents from the Gestapo. It is said that Granville was the inspiration for Vesper Lynd, a spy in Ian Fleming’s first James Bond novel, Casino Royale (1953).

Anna Eavis, Curatorial Director at English Heritage, said: "Christine Granville served Britain bravely and brilliantly during the Second World War. We hope that our blue plaque will help more people to discover her remarkable story and her connection with London."

Clare Mulley, author of The Spy Who Loved, Granville’s biography, said: "All too often women in the resistance are remembered for the beauty and courage, while their achievements are overlooked. Krystyna Skarbek, aka Christine Granville, was one of the most effective special agents to serve Britain during the Second World War, male or female.

"Her achievements, which included securing the defection of an entire German garrison in a strategic pass in the Alps, and saving the lives of many of her male colleagues, led Churchill to call her his favourite spy, and Britain to honour her with the George Medal and OBE."

One of the men whom Granville saved – using a mixture of bluff and bribery – from the Gestapo firing squad was Francis Cammaerts, a British agent who led the clandestine Special Operations Executive in south-eastern France. Cammaerts was also author Michael Morpurgo's uncle and Michael Morpurgo welcomed the blue plaque to his uncle’s saviour, saying: "Her extraordinary courage was forged by a love of freedom, a hatred of the invader and a love of her beloved Poland. She fought for the Resistance in Poland and France against a cruel and ruthless enemy with fierce determination and saved countless lives including that of my uncle, also in the SOE, Francis Cammaerts. Christine Granville helped preserve our freedom and for that we should be ever grateful to her."

Arkady Rzegocki, the Polish Ambassador to London, said: "Krystyna Skarbek's contribution to the Allied effort is undeniable and she reminds us about the close and effective cooperation between Polish and British intelligence services.

"As part of the Special Operations Executive (SOE), an organisation formed to conduct espionage, sabotage and reconnaissance missions in Nazi-occupied Europe, she gathered valuable intelligence, such as crucial information on the Nazi’s preparations for Operation Barbarossa, the proposed invasion of the Soviet Union. Skarbek impressed British Prime Minister Winston Churchill so much he dubbed her his favourite spy. Therefore, I am proud and pleased that English Heritage is honouring Krystyna Skarbek with a Blue Plaque to pay tribute to the memory of one of the most remarkable Second World War secret agents."

The English Heritage Blue Plaque adorns the former Shelbourne Hotel (today, 1 Lexham Gardens Hotel) in Kensington and is inscribed with both the name she adopted, Christine Granville, and her original name, Krystyna Skarbek. After her outstanding wartime career, Granville faced what she described as “the horrors of peace” and the Shelbourne Hotel – run by the Polish Relief Society – provided her with welcome cheap accommodation. The hotel was her home from 1949 until her tragic death there at the hands of an obsessed stalker in 1952.

Christine Granville is the latest female secret agent from the Second World War to receive a blue plaque from English Heritage, joining Violette Szabo and – most recently – Noor Inayat Khan. Only 14% of the over 950 London blue plaques celebrate women and while this is still unacceptably low, English Heritage’s ongoing ‘plaques for women’ campaign has seen a dramatic rise in the number of public nominations for women since the campaign was launched in 2016. Later this year, the charity will unveil a plaque to Barbara Hepworth, one of the 20th century’s greatest artists. Nominations are the lifeblood of the London Blue Plaques Scheme and if we are to continue to see a significant increase in the number of blue plaques for women, we need more female suggestions.

To find out more, including how to nominate someone for a blue plaque, visit: https://www.english-heritage.org.uk/visit/blue-plaques/

The English Heritage London Blue Plaques scheme is generously supported by David Pearl, Knight Frank and members of the public.