Contract choices

Im in year one of a four year contract with a company in which I get a degree. After I graduate in four years I have to stay for two years or pay them £65k to leave.
Should I stay the six years or look to transfer uni courses after three so I can still graduate and move employers?

You stated that you have two options:
1. Leave after four years and pay them £65K.
2. Leave after six years and owe them nothing.
Where does the leave after three years option come from? How much do you have to pay them then?

Nothing if I leave after three; the option is to move from the employed course to a normal uni to finish my degree