[1] After the outbreak of World War II she began training as a Wren at the code-breaking facility Bletchley Park which she said she found to be "unbelievably boring".
[2] In 1946, after being "demobbed" her grandmother entered her into a competition at Vogue Magazine where she won the opportunity to work as an assistant in the wardrobe department at Gainsborough Studios in Islington.
[3] Once there, she began cutting her teeth on films like Brian Desmond Hurst's A Christmas Carol; Alfred Hitchcock's The Man Who Knew Too Much and on Anatole Litvak's Anastasia.
[citation needed] Dalton gained notoriety as a costumer in the latter part of the 1950s, making a name for herself on films like Island in the Sun (1957), directed by Robert Rossen, starring James Mason and Joan Fontaine; and Our Man in Havana (1959), directed by Carol Reed, starring Alec Guinness and Noël Coward.
A few of the other stars who have worn her creations include Elizabeth Taylor, Kim Novak, Maggie Smith, Emma Thompson, Robin Williams, Keanu Reeves, Denzel Washington and Michael Palin.