Take another look at the Tornado. It is a sleek swing-wing bomber. It is the long-range interdiction bomber for England, Italy, adn Germany.
The UK also has the F3,a fighter version.
These jets have ranges of 2000 miles and compare well with the F-111 of F-15E.
The B-1 is sleek. The Jaguar is NOT sleek by comparison. With all the hard points and ordinance, the aircraft in the pic is anything but sleek, fast, high-endurance or maneuverable.
Effective perhaps -- maybe the best in the RAF stable. But not sleek. e.g., the Spitfire was sleek; the Hawker was not.