Hi,
As you have stated that you solely own the property the starting point is that 'whoever has beneficial ownership of the property has beneficial ownership of the income.
Please refer to the guidance located at
TSEM9160 - Ownership and income tax: legal background: ownership - income follows property
As the property is not held 'in joint names' then you would not have to make a formal Form 17 election.
Please therefore refer to the following guidance in respect of making a declaration of trust (to declare yours and your husband’s beneficial interests in the property), this would then enable you to transfer all/part of the rental income to your husband.
TSEM9520 - Ownership and income tax: express trusts - written declaration.
You will not be required to submit the declaration to HMRC, however you must keep a copy for your records as this may be requested from you at a later date.
Thank you.