Any accident of this nature would bring into question the safety aspects...bendy, decker, single decker, midibus or minibus. Whilst bus routes are difficult, much of the traffic management in place is perfectly navigable with skilful drivers.
Some of the standards of driving I've seen in Central London have appalled me, from drivers of deckers and bendies from many companies, and it's not the routing, but the driver who will probably be questioned about this.
Most, if not all, varieties of turns/corners/lights/traffic management are navigable with artics, and in the cases where it's not, you'll also find you will have trouble fitting a decker or a single decker through, if you can.
Regards
Dave