Edith Helen Vane-Tempest-Stewart, Marchioness of Londonderry, DBE (née Chaplin; 3 December 1878 – 23 April 1959) was a noted and influential society hostess in the United Kingdom between World War I and World War II, a friend of the first Labour prime minister, Ramsay MacDonald.

The WVR was established in December 1914 in response to German bombing raids on East Coast towns during the First World War[2] Lady Londonderry also aided with the organisation of the Officers' Hospital set up in her house, and was the first woman to be appointed to be a Dame Commander of the Order of the British Empire in the Military Division, upon the Order's establishment in 1917.

[4] In 1935 she helped to establish the Women's Gas Council,[5] as its first president,[6] assisted by organising secretary Katherine Halpin.

They also owned other properties such as Seaham Hall and Wynward Park in County Durham, and Plas Machynlleth in Wales.

A number of gifts received by Lady Londonderry from Queen Mary, Sir Philip Sassoon and others were auctioned at Sotheby's in 2012.