The Lotus Omega is based on the previous model to those drawings. I've got side/front/rear three views, but only of the standard Omega of that model. I'll post 'em when I get home, but you'll hafta add the flares and spoilers yourself.
Badge engineered for the English and European markets. No mechanical or body differences whatever. I suppose the bench racers argued about the superiority of the aerodynamics of the respective badges and stickers. For a while, the Lotus Carlton/Omega was the fastest series production sedan in the world, with only the AMG Sledgehammer as competition, and they were built to order only.