Australian-born Harder began in 1984 on a weekend stall at Camden Market, selling for Indian accessories brand Hidesign, before backing from the Tula Group let her develop a women's line of her own. The brand officially launched in 1998 and found early traction through a distribution partnership with John Lewis, motivated by Harder's wish for more vibrant, colourful alternatives to a conservative market.
Positioned in accessible luxury, Radley now makes handbags, small leather goods, luggage and footwear, and licenses its name across eyewear, jewellery, watches and beauty. The house has changed hands among private-equity owners — Phoenix in 2006, Exponent in 2007, and Bregal Freshstream since 2016 — and counts collaborations with Harris Tweed, Holly Fulton and the V&A.