Boltar gurgled happily, sounding much like they
were saying:

1 dead , 4 serious.

http://news.bbc.co.uk/1/hi/england/london/7410203.stm

Didn't side swipe bars get installed on all double deckers at the top
left for just this eventuality?

The pic shows that the roof pillars have bent, and the main roof itself
is damaged. The bars are just to push smaller branches out the way - they
won't protect against a trunk or solid branch strike. The driver's meant
to do that bit.