Solo on the X66?! I don't profess to be a regular passenger on it at all, but whenever I have used it, there's been standees even on an Omni.

I've heard that the present allocation for service X66 is 3 Pulsars and 2 Solos.

You don't get standing much on the X66 in my experience, you sometimes have to if you get one from Darlington after 0930 when concession passes can be used but pretty much the only other times I've had to stand on the X66 is if the one in front has broke down or it has suffered major delays.