The main applicant, and any dependants over 18 years old, must also have passed the 'Life in the UK' test before they apply for ILR. Home Office guidance states that a test must be booked at one of the 5 centres closest to where the applicant lives. When booking the test a residential address is entered and the closest centres are indicated.
Booking a 'Life in the UK' test
When booking the test the applicant must state what documents they will present on the day as proof of identity and address. If there are any differences in their details, or the documents presented on the day, they will not be allowed to sit the test, and will have to book and pay for another test. The identification requirements and terms & conditions for booking a test are details in Home Office guidance.