Indefinite Leave to Remain - Set (O) or Set (M) form?

[sunny_ver]

Hi All, seeking advice, as I am applying for my wife ILR application ( she completed 5 years in UK as PBS dependant). Last time we applied for her PBS dependant visa extension along with my ILR application back in Oct 2018, her current BRP says " PBS Dependant Leave to Remain". Now I have obtained my British Citizenship so should she apply for ILR with form Set (O) or Set (M)?

if Set (O), this form needs my details like CoS/VAF or GWF number - which is no longer valid as I am British Citizen so can you please confirm if it needs my COS details only?

Thanks in Advance

[CR001]

She can only apply using form SET O.

You need to complete the CoS details etc from your last tier 2 sponsor.

SET M doesn't apply as she doesn't hold a qualifying spouse settlement visa.