At the Savoy Hotel , Christian Dior , famous Paris dress designer held a display of his creations . This is the first fashion show held by Dior in London and his own models were flown over specially for it . One of Dior's fashions , Paris Sport , a grey flannel ensemble , worn with large natural straw hat . The model is Sylvie , said to be the most photographed model in Paris , and to have the smallest waist 20" 25 April 1950