Where do I go for biometrics (UK visa)?
You must book your biometric appointment at a US Department of Homeland Security application support centre (ASC) when your online application is completed and payment is made online. This is to have your photo and fingerprints taken (known as ‘biometric information’). When you visit the ASC for your biometrics appointment, please take your current passport, a print out of your application form and a copy of your biometric confirmation receipt. You can print your receipt when you apply online.