1. All applicants have to enroll biomtric, regardless of how recent biomterics were enrolled for another application made.
2. You are overthinking!!!
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You do not need WhatsApp screenshots to switch form a fiance visa to a spouse visa.
She could have applied from a few days ago already. But yes, she can apply anytime before her current visa expires.Oh, so she can apply from within 28 days of the entry date period (e.g. 15 January 2021), and until the visa expiry date. Is this correct?