1. Dear *****, your brother will be able to apply for UK citizenship as he has had Indefinite Leave to Remain since 2011. Essentially, you only need to have lived continuously in the UK for the last year in order to apply for UK citizenship if you have ILR. Accordingly, your brother should now apply for UK citizenship. Here is a link to the UK Government website where your brother can apply and which sets out the requirements. A link to the application form is included as well https://www.gov.uk/becoming-a-british-citizen/how-to-apply
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