The title of this paper is “V.T.OX. and S.T.O.L. Aircraft and Helicopters and the System of Air Traffic Control they will require,” but it does not set out to give an audience of Air Traffic Control experts a lecture on how they will have to run their business in the future. What it does do is to make a few remarks on how the operators will wish to run these types of aircraft, when they have them, and to draw some inferences about the new problems in Air Traffic Control which will have to be solved as a result.