Warning over new US travel rules
The Foreign Office is warning that thousands of tourists could be turned away at US airports and ports, as a new online entry system comes into effect.
From 12 January, visitors from countries which do not need visas will need to fill in an electronic form at least 72 hours before they travel.
Those who have not registered risk being detained and sent back home.
The new online registration scheme replaces the green I-94 forms that people on short term visits to the US had to fill in on the flight and hand to customs on arrival.