Holding valid, full validity e-passports with an electronic chip who are traveling
for business, pleasure or transit for less than 90 days. Visa-free travel does not include those who plan to study, work or remain in the United States for more than 90 days;
are not ineligible to receive a visa under U.S. visa law. Travelers who have been arrested, even if the arrest did not result in a criminal conviction, those with criminal records, (the Rehabilitation of Offenders Act does not apply to U.S. visa law), certain serious communicable illnesses, those who have been refused admission into, or have been deported from, the United States, or have previously overstayed on the VWP are not eligible to travel visa free under the Visa Waiver Program
https://uk.usembassy.gov/visas/visa-waiver-program/non-immigrant-visa-waiver-program-vwp/: