London (my knowledge base) has two radar systems that apparently will not simultaneously fail. When they do, there is simply no way of employing procedural control in any sector I am aware of due to the complex route structure needed to move everyday traffic. The procedures are very simple to clear the skies and I just hope it never happens in earnest in the worst possible manner as I agree, they are borderline realistic. What would have happened if the Brussels tower was located directly above the terminal that was bombed?
22 years is how long London could still have Procedurally trained controllers for, unless they leave pre-pension age.