Poor punctuality has various implications. One is that carriers, in trying for the same number of rotations per day, have pushed first wave start times forward from the old 0730 to nearer 0600, while at the other end scheduled arrival times close to midnight, with regular late arrivals of 0100 etc, are increasingly common. One knock-on is that such times make public transport to/from the airport increasingly impossible, the opposite of general policy, although if it drives up airport revenue from increased car parking that must be, secretly of course, pleasing them.