Re: 65 bus route
London Transport used to claim that long waits and a convoy of buses arriving at the same time was the result of "bunching" on the long routes through Central London.
But I used to get a bus from time to time a couple of stops after a terminus. Over the course of 40 or so minutes I'd see 4 or 5 buses ( same number I wanted) go up to the terminus, a couple of stops away. And nothing coming down for me to get on to. Then they'd appear. Together, in a row.