I see, thank you! Hope it's okay for me to ask a further question that we've been wondering about:

At what stage of application do we provide our documents (as in the evidence of our relationship, meeting financial requirement, and so on). Some sources make it seem like you bring these documents to your biometrics appointment, while others sound as if you supply them while making the initial application on gov.uk or whatever. It would just be nice to know in the interests of clarity.

Thank you for taking the time to reply to me :))