It's the book price and normal interest rate.
If you shop around you may get a dealer giving a discount. Yesterday you were buying it with your friend and going to try and use her NHS discount!
There are dealers out there giving discounts you just need to shop around and haggle.
What Ian has said above is good advice, you will also need to check and see the finance company are happy that the car could have different names addresses on the V5 than the finance agreement, some won't.
You could always try and get finance in your name with your dad as guarantor