Business permit
Businesses can get one free permit per leaseholder, valid for one year.
For a business permit you need:
Proof of business address – for example a copy of your business lease agreement or a recent utility bill.
and
Proof of business use – either a copy of the 'log book' (V5C vehicle registration certificate) if the vehicle is registered to the business address, or a letter from the business owner confirming the business vehicle details.