Watch UK Border Force

A freak snow storm shuts down the British transport system. Just one flight lands at Heathrow, re-directed from Gatwick. A charismatic passenger from Antigua charms the immigration staff. But his complex case creates a division between the immigration officer and her boss.

The owner of a nail bar in Southampton is an asylum seeker whose partner is a known illegal immigrant. He's suspected of employing other illegal immigrants as nail technicians. The enforcement team find the owner's girlfriend holding a baby that hasn't been registered and the employees deny being illegal. The team has its work cut out deciding out who stays and who goes.

For the first time television cameras go inside the British High Commission in Lagos, Nigeria. It's a city that has a worldwide reputation for fraud and where travel documents are sold openly on street corners. Here the UKBA visa team are swamped with applications for UK visas, and they rarely have a dull day.

We have rare access behind the scenes in an Immigration Removal Centre where the UKBA officers are planning a mass deportation on a specially chartered flight, codenamed Operation Aardvark. In London the enforcement team bust a network of illegal workers at the home of a Chinese takeaway owner. In a room with 6 beds they find a group of men about to eat their dinner.

A Jamaican man is arrested in Birmingham on his wedding day. He's an overstayer who mistook his certificate to get married as permission to live in the UK. He was sent back to Jamaica. In Glasgow a Pakistani national is arrested at the registry office minutes before he was to be married to a Scottish woman. The man claims it's true love. The bride says she was paid to be there.