Staying more than 450 days out of the uk

[ghinaoudeh]

I have had a no time limit residency in the UK since March 2016. Therefore I am eligible to apply for the British passport in March 2021. I understand that I am allowed out of the UK for up to 2 years and have to make a landing before the 2 years is up. Can I be out for 2 years running? I keep reading I'm not allowed out of the UK for more than 90 days or 450 days in the 5 years so I'm confused. Can anyone please explain?
I've been out of the UK since July 2018 until now so I'm worried I've jeopardized my future application for the passport.

[CR001]

I'm not allowed out of the UK for more than 90 days or 450 days in the 5 years so I'm confused. Can anyone please explain?

The absence limits for British citizenship are no more than 450 days in the WHOLE 5 years immediately preceding date of application and no more than 90 days absence in the 12 months immediately preceding date of application. So you have been absent for 5 years, you don't qualify for citizenship.