Yes, but if you have shared finance, we need to be extra sure that having this loan wouldn't put either of you under any financial strain, and that you haven't had any problems paying bills in the past.
If you and your partner don't have shared finance, then the normal rules apply and we can accept them as long as they meet our criteria.
A suitable cosigner is someone who has a credit score of 750 or more and a strong history of paying their bills on time. They must be able to afford the monthly repayments if you do not make them. Additionally, homeowners (not tenants) are much more likely to be approved.