Hi,
1) No change of ownership is required.
2) Your wifes’ share of the income whatever it is should be declared on her tax return.
3) No a Form 17 would not be valid in these instances but deed of trust is. The guidance is here:
TSEM9160
4) Yes you can submit a declaration of trust to HMRC. You would send this thorough the post with a covering letter explaining the situation. Please make sure that both you and your wifes’ national insurance numbers are on the letter and that you have both signed the letter. You are advised to make a declaration of trust through a Solicitor.
5) A declaration of trust is a legally binding document that creates a trust. However most types of trusts giving an interest in property to somebody who is not the legal owner now need to be registered with HMRC via the Trust Registration Service. You can find guidance on the registration requirements and how to register here:
Register a trust as a trustee.
There’s also more information about what type of trusts need to be registered at:
TRSM23050
Thank you.