The forthcoming Corkscrew class will be classified as a "sloop" by the DDS reflecting that it will fall between the frigate Isometric and the corvette Rome in size. Although specification lock-down is still a couple of years away the DDS have released some details of the Corkscrew which is expected in service in the mid-part of the decade.
It's primary role will be patrol and the Corkscrew will have very good crew facilities to allow for longer patrols. It will share the mission module capability of the Rome and will use the same modules as the Rome. As for armament this is expected to be a Zip cannon, TPM-2 launcher and 2 MRMs.