After graduating from London's Saint Martins in 1992, Giles Deacon worked with Jean Charles De Castelbajac in Paris for 2 years. From 1998 until 2002 he was a designer at Bottega Veneta and the Gucci Group. In February 2004 Giles presented his first collection at the Chelsea Pensioner's Club at the Chelsea Royal Hospital. The show was styled by Katie Grand with music by Steve Mackey of Pulp and lighting by John Akehurst. Models included Karen Elson, Eva Herzigova and Nadja Auerman. The collection was featured in American, British, Japanese, Italian and French Vogue, as well as W, Harper's Bazaar, POP and i-D and was bought by Harvey Nichols, Liberty and Selfridges. In November 2004 Giles was awarded ?Best New Designer? at the British Fashion Awards. This was followed by Giles being awarded the Elle ?Best New Designer? award in February 2005.

　　In 2006 Giles collaborated with American Express on the Red project. In November 2006 Giles was awarded ?British Designer of the Year? at the British Fashion Awards. In addition to expanding the ready-to-wear collection with a pre-collection, an important commercial development for the label, Deacon introduced accessories in a two season collaboration with Mulberry called Mulberry for Giles, which was a commercial and critical success. He also added an on going consultancy with New Look to design New Look Gold for the high street retailer. Giles also designs for the FAY brand of the TOD's group.