They say it was not an "airprox event". They have to be kidding don't they! I mean 600ft and 0.4 of a mile. Would it have been an airprox event if they had got that close and the lightie had been flipped over due to the wake turbulence. They really are forgetting how dangerous it is for two aircraft (with one being reasonably large) to be this close to each other. The world has gone absolutely flipping crazy, if this is considered to be ops normal. Very very scary state of affairs.