Is Certified Copy Entry Of Pursuant Of Birth Equals British Citizen

Hello landers,I want some clear cut advise on this issue;

I have a friend who happens to be born in the UK and due to some family issues,the Mum n Dad got separated and She has to move to Nigeria with the Mum (when she was 7),all she has  is a certified Copy entry of Pursuant of Birth i.e (birth certicate).My Questions goes thus: Is it possible to claim a British Born with this certifcate,If Yes,How and What are the processes involved.I will be glad to get some sincere and genuie answers.

Before i can say anything, what year was the individual born?

1986?

Then she will not qualify for UK CITIZENSHIP by virtue of birth I'm afraid.

@ernal
1982 and backwards, !!!!!

Thanks all,Her Dad is still in the Uk but he wasnt a british citizen when she was born,He was a student.Thanks  all again for your response.

i also have the same issue. i came back to Nigeria since i was 4 n i've bn living with my gran-ma since then, but i'v gone on holiday once when i was 12 n since then i'v bn denied entry into the UK. Didn't even know i had a certified copy of entry till recently when i needed to submit my BC to my school.
now my question is, what i'm i suppose to do now, cos i know somehow i should be a citizen by birth. i don't have a Nigerian BC, my gran-ma is late now, my parent are not together, so i'm totally on my own with this.
pls some1 tell me what to do

your not a british citizen unless one of your parent was atleast a permanent resident (watever its called in the UK) at the time of your birth or you have continously resided in the UK permanently for atleast 10 yrs after birth.