The Royal Navy has one uncrewed small sub demonstrator (MANTA) and a larger one on order (CETUS). Uncrewed subs are an AUKUS sub-project as well, with a specific event at sea planned for this year (if plans have not evolved in the meanwhile). https://t.co/3toY6MxCVH

— Gabriele Molinelli (@Gabriel64869839) April 18, 2023