Several million British nationals travel to the US annually under the Visa Waiver Programme without any problems. Only people described as a "British Citizen" on the photo page in their passport qualify to enter the US under the VWP. If you are described as a "British Subject", "British National (Overseas)", "British Overseas Territories Citizen", "British Dependent Territories Citizen", "British Protected Person" or "British Overseas Citizen", you will need a visa.
You will also probably need a visa if you fall into one of the following categories (Note: this list is not exhaustive).
You intend to stay longer than 90 days
You intend to travel to the US for a reason other than business, pleasure or transit
You are conducting official government business
You have been arrested (even if not convicted)
You have a criminal record
You have a serious, communicable disease (including HIV)
You have been refused entry to the US on a previous occasion
You have been deported from the US
You have overstayed during a previous visit
If you are unsure, or if you think that your situation falls into any of the above categories, you should consult the US Embassy – you must do this well in advance of any plans to travel.
Does my British passport allow me to travel under the VWP?
To enter under the VWP your passport must contain a machine-readable zone (MRZ).
At the foot of the photo page. The MRZ contains 2 lines of text as letters, numbers and chevrons (>>>). If the area is blank the passport is not machine-readable and you need to apply for a visa.
The new style passports containing a biometric chip and an MRZ are acceptable for the VWP.
My child is included in my passport is that OK?
No - each person entering under the VWP must have their own MRZ passport.