AK MOTOR SALES UK LTD T/A Masons Car Sales (MCS) are authorised and regulated by the Financial Conduct Authority under FRN Reference number: 1044497. Finance Subject to status. AK MOTOR SALES UK LTD T/A Masons Car Sales (MCS) is authorised as a CREDIT BROKER and NOT A LENDER. This means we work with a number of carefully selected credit providers who may be able to offer you finance for your purchase.