Matthewson takes over from Okey (pictured) as well as Alvaro Morales, chief executive of Santander Private Banking UK, who is moving to Miami to become chief executive officer of Santander Private Banking International.
It is not yet known where Okey’s next move will be.
Matthewson will continue in his role as director of the bancassurance division prior to taking up his new role, which is subject to FSA approval, on May 1.
Santander UK executive director Antonio Lorenzo says: “This new role has been created as an essential part of Santander’s goal to be the UK’s best commercial bank. Alan has a great track record with Santander’s bancassurance team.
“The Abbey for Intermediaries and private banking functions are vital areas for our growth plans in the UK, and I look forward to working closely with Alan to ensure our success.”