Loans from family, friends, partners and so on do not normally cause problems. If you had taken a commercial loan yourself or a credit card advance, many lenders would be uncomfortable.

I am buying a property on my own, mortgage approved and offer accpeted. Surveyor viewing property this week.
I have a deposit of £6600 which is made up of £1600 from my parents and £5000 from my partner (Which is a loan to me). The £5000 my partner has loaned me is itself a loan she took from a work Credit Union.By the time I complete I will have been paid twice and repaid my partner.
Question is, when the mortgage people check where my deposit has come from, will this cause a paroblem that my partner took a loan to give me? The money was paid into my account from her bank account.