Which Dragon's Den entrepreneur founded the lingerie brand Ultimo?

Michelle Mone founded the lingerie brand Ultimo.

Mone launched Ultimo in 1996 after developing a design intended to improve the fit and appearance of strapless lingerie. The brand became known for fashion-led lingerie and grew into an internationally recognised name.

She appeared as a guest investor on the British Dragon's Den panel. Her business career is principally associated with fashion, product design and brand building rather than with the permanent core panel of dragons.

Kelly Hoppen is another prominent entrepreneur who appeared on the programme, but she is associated with interior design. Deborah Meaden is known for investments across consumer and leisure businesses. Those distinctions matter because several successful female entrepreneurs have appeared in the show's investor lineup.