In regards to the listed aircraft with single engine, i was talking about front liners (intercept and attack).
The Gnat etc were not front liners.
The Hawk in the UK can augment the Interceptor force and to an extent attack force but they are not front line (although they are used for front line in other countries)
I understand the survivability issue so why do countries still develop single engined interceptors and attack aircraft (F-16, Gripen etc) when the chances of banging out and losing a jet due to engine faliure are obviously much higher than that of a two jet plane.
Surely the cost of the jet being developed doesn't out weigh the fact that when they start falling from the sky with an engine out then it starts getting rather expensive also.