Ask an Immigration Solicitor. Get an Answer ASAP.
Are you an EU citizen?
Yes you would need to apply for a document certifying permanent residency before you can apply for British citizenship. Each children will also have to apply for the said document. When was your child born in the UK?
Yes you will need 5 years continuous residence. After 12 months you can apply for British citizenship
I asked because some children born to EU citizens acquire British citizenship but your child doesn't. Settled status and PR are the same.
Your children will get the same as you.
All your children should apply for PR if they are here for 5 years
If you want to apply for British citizenship, you need to first apply for a document certifying permanent residency.
Good luck with your application for British citizenship.