By Graham Tibbetts
Last Updated: 12:01am GMT 13/11/2008
Under the new scheme tourists will be advised to apply online for approval for travel from the US Department of Homeland Security at least three days before they leave.
Anyone denied permission will be barred when they attempt to check in at the airport.
The measure is aimed at tightening US border controls to prevent a repeat of the September 11 terror attacks. Known as the Electronic System for Travel Authorisation (ESTA), it was introduced in a soft launch in August but will be compulsory from January 12.
It replaces the I-94 form, which is currently handed out during the flight to passengers from Britain and a number of other countries who do not require visas. Applicants will provide the same biographical information and passport details, including names, passport numbers, date of birth and destination, as with the I-94 form.
British travellers could be banned from flying to America - Telegraph