You will require one proof from the below for any of the applications:
UK Registration Certificate (V5/C)
Lease, Finance or Rental Agreement
Car insurance documents - but only if you are the policy holder and it shows your full name, application address, and vehicle registration mark
Company Vehicle - You must provide a company letter dated within 28 days of your application to confirm all of the following: you are an employee/director, you are authorised to drive the vehicle, you keep the vehicle overnight at your address, vehicle registration number, name and position of the person signing the letter