It's only available for a limited number of civil disputes eg family, housing, debt and asylum and immigration. There is a strict merits test. The merits test criteria can be found in s11 of LASPO and, amongst other factors, includes the likely cost of providing the service, the appropriateness of using funds for the particular case and the prospect of a successful claim. Applicants also need to pass the means test. The disposable income and disposable capital of the applicant is assessed