There can be. Generally, they break down like this. Trade sellers, private sellers.
Trade sellers are acting as a business. The business may own the car or they may have been given the approval to manage the sale. As a legitimate business, they must follow all legal requirements operating under the Consumer Rights Act 2015. You can read The Act in full, HERE.
Private sellers are just that, private sellers. They confirm to us they own the car, have legal title or are legally authorised to sell, for example as part of a deceased estate.