The British LCM (9) Class
The prototype L-3507 was delivered in 1963 and Fearless and Intrepid could carry four each. Fourteen were built 1964-66 (2 by Vosper, 6 by Richard Dunston, 4 by Brooke Marine and 2 by Bolson & Sons.). Could carry two Centurions or 100 tons of cargo.
Thanks to BH for the source material to complement the photo sources so well. This was an unintended by-product of another project but its good to have this on SB.