Forget ambition, financial security and that first-class degree.

A controversial study has concluded that the real reason women pursue careers is because they fear they are too unattractive to get married.

The research team, made up of three women and two men, said that when men are thin on the ground, 'women are more likely to choose briefcase over baby'.

And the plainer a woman is, they claim, the more she is driven to succeed in the workplace.