Indefinite Leave to Remain (ILR) is a type of immigration status in the United Kingdom that allows individuals to live and work in the UK without any time restrictions or the need for further visa extensions. ILR is also commonly referred to as settlement or permanent residency.

To be eligible for Indefinite Leave to Remain, applicants typically need to meet specific requirements, which can vary depending on the visa category they currently hold.

Some common requirements for ILR include:

1. Length of residence: Generally, applicants need to have resided lawfully in the UK for a specified period, typically five years or more, under a qualifying visa category.
2. Continuous residence: Applicants should have maintained continuous residence in the UK during their qualifying period, which means they have not spent an excessive amount of time outside the UK.
3. Immigration status: Applicants must hold a qualifying visa or immigration status, such as a work visa, spouse visa, or Tier 2 General visa, throughout their qualifying period.
4. Knowledge of language and life in the UK: Applicants may need to demonstrate their knowledge of English language and have an understanding of life in the UK by passing the Life in the UK test.
5. Good character requirement: Applicants must meet the good character requirement, which involves having no criminal convictions or a record of dishonesty or immigration breaches.

The application process for Indefinite Leave to Remain typically involves completing an online application form, submitting supporting documents, attending a biometric appointment, and paying the application fee. The Home Office will review the application, conduct background checks, and make a decision.

It's important to note that the specific requirements and procedures for ILR can be complex and may vary depending on individual circumstances and visa categories. It is advisable to consult the official UK government website or seek professional advice from immigration lawyers or advisors who specialize in UK immigration law for accurate and up-to-date information regarding Indefinite Leave to Remain applications.