Shop around before you buy, last month i brought from a dealer a 1 1/2 year old primastar (same van but nissan's ) with electric windows, air con, reversing sensors and 14000 miles on the clock for £6300 inc vat, still got 1 1/2 year warranty on it and its its in excellent condition.
I know yours is brand new but is 1 1/2 years worth nearly £7500 more.
Darren