(03 Jan 2016, 1:22 pm)Dan wrote Stagecoach would probably reduce capacity on the route.

Like Go North East's X66 service, there are times of the day when you can see the bus completely empty, meaning that lower capacity (and more fuel-efficient) vehicles can be allocated with no issues. Problems arise at peak times, but with a bus every few minutes on a "turn up and go" frequency, it's not really an issue.

Which would then still leave where 27506-10 would be cascaded to. I think that, rather than the issue of dropping capacity on the 100, might be the reason why they've not been replaced on there yet.