HMS Marlborough is a Duke-class Type 23 frigate formerly in service with the Royal Navy, and the sixth ship to bear the name. She was named after John Churchill, 1st Duke of Marlborough. The ship entered service with the Royal Navy in 1991 and served in the Middle East. The frigate was taken out of service in 2005 and sold to Chile. The vessel entered service with the Chilean Navy in 2008 as Almirante Condell. The ship was significantly upgraded from 2020 to 2021 and remains in service.