Requirements for naturalisation certificate

[BkM1986]

Hi,
I was hoping to get some guidance around applying for my naturalisation certificate. My questions really are.

1.if I have ilr and I have been residing in UK from March 2015 to March 2016 on student tier 4 visa. From April 2016 to Feb 2018 on spouse visa and I got ilr after separation from my husband in May 2018. As of Match 2020 can I apply for naturalisation certificate?

2.if the answer to question 1 is yes. Then is my understanding correct I need ielts b1 and I cannot use ielts academic certificate which I had passed with 7.5 score I may 2015.

3. After ielts test I need to give life in UK test and then I can apply for naturalisation.
4. How long will the whole process take?

Many thanks

[zimba]

You need to hold ILR for 12 months to apply for naturalisation so you have been eligible since May 2019. How did you get ILR ? People who got ILR from Oct 2013 and onwards automatically satisfy the English language requirement. Didn't you get LIUK as part of your ILR ??!