Following the enforcement teams at Heathrow Terminal 3, Calais, Dover.

Following the enforcement teams at Heathrow Terminal 3, Calais, Dover.

Cameras gain access to the British Commission in Lagos, Nigeria, a city with a strong reputation for fraud; staff at a West London steakhouse are grilled in the search for illegal immigrants.

A couple living under stolen identities for 13 years; and an enforcement raid seizes two illegal workers.

A suspected illegal immigrant tries to escape, while another man is suspected of being a drugs mule.