You may have seen Ling on Dragon's Den. She went on the BBC in 2007.
Duncan Bannatyne offered to invest in LINGsCARS, but Ling rejected his offer. He then made a better offer, but she rejected that, too.
Ling thought he wanted too much of a share, for what he was offering, but she went on Dragons' Den for the publicity, not for the cash.
These days, LINGsCARS is worth millions of pounds, so I think Duncan Bannatyne missed out.