As long as you meet certain conditions, you can get a loan to help with the interest payments on your mortgage. But, you will have to wait 9 months from the date you first apply for Universal Credit to get this help and it won't be backdated.
You can’t use UC to pay for most temporary housing. But, you can apply for Housing Benefit to help with this cost and still claim other elements of UC to help with your daily living costs.
An amount will be taken away from your UC housing costs payment if there are other non-dependent adults living in your home who should be contributing to the household’s costs.