She did a series of TV adverts targeting older people, flogging what would be, for them, a piss poor value financial product.
Michael Parkinson did it, too.
Pure avarice or stupidity, possibly both, to take a fee for spouting the words they did.
It's relevant to what Vorderman did next, I think, in that she started to develop her persona into that of a 'television personality', and for example was instrumental in the descent of the chat show 'Loose Women' into Take A Break territory (ie dim, ill-informed, faux controversial).
She is a construct, moderately interesting in that she trades on a reputation of being quite clever in order to do ignominious things for money. Part of the construct she is carving out quite deliberately is most definitely predicated on her physical image, but I think her judgement is off, and therefore when she posts a photographs of herself in the public domain she possibly is buying into her own construct in a way that most of here aren't.
But then again, I know fuck all.