Dudley is commonly used by brokers who have had clients turned down by mainstream lenders.
Steve Walker, managing director at Promise Solutions, said: “Dudley is a well-respected lender with some fantastic products and a great reputation for friendly customer service.
“Our experience in handling complex cases and extensive broker relationships mean we can help more customers to benefit from Dudley's offering. The ability to build a close relationship with a local society should also bring additional benefits.”
Jeremy Wood, chief executive of The Dudley, added: “We are delighted to increase our geographical coverage through our new relationship with Promise Solutions.
“They are a well recognised packager throughout the UK, which means we will be able to help more brokers and their clients across a wider area.”