Just checked my Lex lease contract and it states under early termination I am due to pay 50% of any rentals unpaid.
i.e if it's a 2 year contract and I terminate after 1 year I'll have to pay 6 months worth of rentals.
I just wish i had my car, I was due to have my Z4 delivered last week but it was written off on a BMW transporter before I even saw it!