Professional Studies Loan

£ 15-20,000 would be ready for 5 years for something like medical school and invest in a bond / capital account or a guaranteed investment scheme guaranteed to others for profit or not, if so, where would a loan from the / invest??? (UK based).

My gut says no profit here. But I was wrong before. :)

In the U.S. there are some loan programs that have interest rates below market rates.