well I have the feeling you could make it really "grow" if you added a few more shadows. For instance under the intake, the lower part of hte actual intake is shaded but it doesnt cast a shadow on the fuselage which it should. Also you seem to draw shadows as a one part affair which is ok for smaller ones but on big ones it really leaves a simplified impression, like on the one casted by the wings. BTW I think this would be a cool profile to show the over wing missile racks these machines had! It's such a unique feature to some british jets like the Jaguar and the Lightning

Anyway as it is it is ok too but with a little bit more work it could really standout!