You can buy almost everything on social media – how about a British dad for your child? A year long BBC investigation has uncovered a brazen illegal immigration scam in which pregnant migrant women who are in the UK without a visa are paying British men thousands of pounds to pose as fathers to their children. The women gain British citizenship for their child, which means they may be able to get the right to remain themselves. The fake fathers receive hefty sums of money. And a network of criminal 'fixers' and translators are also cashing in.

Divya Talwar reports.