Regulations 8(2) and 12 1(b) (i) are unlawful regulations, following Metock and the court of appeal in Bigia,in so far as they demand lawful residence in another memberstate, or even presence in another memberstate for rights to be claimed.avjones wrote:the regulations say "living in another EEA state", which Nigeria isn't.
OP, provided you can show you have lived with your brother in same household in Nigeria, and the house you lived at was rented or owned by yourself, and that your brother in Nigeria is financially dependant on you, then you should be fine. Please note that the UK legislation gives so much discretion to an ECO under regulation 12, when it comes to Extended family members, than it does to Nuclear family members.
However , if the visa is refused, the ECO must justify the refusal, and give him a right of appeal of the decision.
Unfortunately, no one can say for certain that he will get it, as it is open to wide discretion.