You might also have noticed that the routes are now run by London
Central rather than Arriva, hence different, new vehicles.

I just hope London Central keep buses to one route or the other - the
buses on the 68 left the route mostly unscathed, but the ones used on
the 468 looked totally trashed. Being London Central I very much doubt
they'll manage it. I've already seen these buses on the 35 and 45, and
etched windows at the rear of the upper deck.