All passengers travelling to the USA under the Visa Waiver Program must hold a passport with an integrated chip.

Additionally, citizens of the 38 Visa Waiver Program countries - including the UK - who have travelled to Iran, Iraq, Sudan and Syria since 1 March 2011 or who are dual nationals of these states, are not allowed to travel to the US without a visa. It's quite likely that other countries will be added to this list.

All travellers wishing to enter or transit through the USA under the Visa Waiver Program must apply for authorisation to travel using the Electronic System for Travel Authorisation (ESTA). Please allow sufficient time when making an ESTA application.

It is recommended that such an application is made at least 72 hours before departure. For further full information please click (need this link in here  https://www.gov.uk/foreign-travel-advice/usa/entry-requirements . To Register through ESTA at the following website:

USA Electronic System for Travel Authorisation