just a thought, but it might be wise to take things one step at a time. dont even think about the finances until you have passed phase 4. that would be a waste of your time instead of concentrating on the simulator test.
wrt to the loan however, rates have come down, natwest are offering secured loans, 2.5 % above base rate though! hsbc will do a home owners loan, around the 5 % APR mark if you have enough equity.
speak with them after your test though, that would be my piece of advise