In BBC Dragon's Den, which Dragon founded Amstrad?

In BBC Dragon's Den, Alan Sugar is the Dragon who founded Amstrad.

Sugar founded Amstrad in 1968, naming the company from his initials and the word “trading.” The business became known for consumer electronics and computing products, including home computers and satellite television equipment. Its growth established Sugar as a prominent British entrepreneur before he became a television personality.

He served as a Dragon on the BBC programme during its early years. His business background made him especially associated with questions about manufacturing, margins, sales volume and the practical costs of bringing a product to market.

A frequent confusion is between Sugar and Peter Jones, who is also strongly associated with technology and consumer businesses on the programme. Jones founded Phones International Group, but Amstrad belongs to Sugar. Sugar later became widely known as Lord Sugar after receiving a life peerage, although the business fact in this question concerns the company he founded rather than his title.