I have a lot less than 1850hrs on type (about 10 in a T2 to be precise), but yes, a Jag could stay airborne and controllable on a single engine through use of partial throttle reheat. A surreal design feature introduced for precisely such reasons.
Not for very long, but it could!
Semi-related, I just heard that a friend's son who grew up around our flying club bumming rides in anything he could, then joined the RAF at 18, is scheduled to fly one of the Tornados in the birthday flypast. A small cause for celebration locally.
G