The United Kingdom is part of the Visa Waiver Programme (VMP). There are 38 countries in total that participate in the Visa Waiver programme. The Visa Waiver Programme permits citizens of these 38 countries to travel to the United States for business or tourism for stays of up to 90 days without a visa.
The Police National Computer (PNC) is the principal police database used by the police. The PNC is an amalgam of a number of databases containing text information relevant to policing. Fingerprints and DNA are not placed onto the PNC, but a reference to these items is logged against names files which link to the National
If you are planning on travelling to the USA and you have a criminal record, you may be concerned about what records the authorities can see. We received several anecdotal reports of UK citizens attempting to travel to the US and being turned away due to arrest records, see here for a recent news