Indefinite Leave to Remain and Seperation

If a partner has achieved ILR status based on spousal relationship and financial backing, does anything change thereafter for the migrant if they decide to separate from his/her spouse, as they would now no longer meet the pre-ILR financial requirements? Or is it the case of once you achieve ILR, then that's it and it doesn't matter what happens thereafter?

does anything change thereafter for the migrant if they decide to separate from his/her spouse, as they would now no longer meet the pre-ILR financial requirements?

No. Once a person has ilr they are independent of any pre ilr requirements.

Or is it the case of once you achieve ILR, then that's it and it doesn't matter what happens thereafter?

Yes.

That's great, thanks for the reply