No way Nottingham Forest are not qualifying for Champions league. From Nottingham Forest down to Chelsea are over with one point. Among the four teams, only Nottingham has been consistently playing well, i don't mind seeing Manchester City not qualify because they have been poorly in form and need time to construct the squad. Newcastle may also not be coming down, Chelsea and Manchester City need to find a way to come on top.
For me it is not guaranteed, and even Chelsea, Man City and Newcastle are still be able of shifting Nottingham position. Chelsea only has a 3 point difference with Nottingham and only needs 1 win for Chelsea to shift Nottingham position.
I don't believe you if you say that only Nottingham are playing consistently while Nottingham have lost their last 2 games. The defeat is proof that there is no guarantee that Nottingham can stay consistent and still get a UCL ticket. There are 6 games left that can change something good to be very bad.