How do I claim back vat in my van when I am leasing from the bank

I have recently got a lease from the bank to purchase a van for my business. The bank told me that I can only claim the vat back on a monthly basis.
How do I go about claiming the vat back when I have no invoice?

Bank will post out invoive each month to you when payment is due.

You'll get a schedule from the Leasing Arm of the Bank.......

Normally, peopke schedule these in as Purchases Not For Resale and reclaim against VAT charged...

You do need to be registered for VAT!