Santander UK, owned by Spain's Banco Santander, said Allen would replace Javier San Felix, who is returning to the Santander Group after three years in the role.

Allen, currently head of customer interactions within the bank's retail division, will start her new role by the end of the year, subject to regulatory approval, the London-based financial services provider said.

(Reporting by Justin George Varghese in Bengaluru; Editing by Mark Potter)