Hi,
Please refer to:
TSEM9520 for details on how to make a written declaration of trust. Taxation of income is based on beneficial ownership:
TSEM9305
TSEM9130
Therefore depending on the split of beneficial ownership you would declare this share of rental income and expenses.
Mortgage relief can only be claimed by the person whose name the mortgage is in however if your wife gives you 100% share as a beneficiary they are no longer a beneficiary of the rental income and no-one can claim the mortgage tax relief.
You can choose what bank account the rental income is paid into, single or joint.
Thank you.