Tipper/skip lorries will always work on the quickest turnaround time possible. So corners will be cut by some drivers, simply by virtue of the fact that they may be getting paid by the load.
Coming back into the urban road structure, the system forces them to have to slow down, but does little to alter their need to get back on site as quick as is possible.
I asked why is it London only that seems to be seeing an increase in this type of incident & no clear answer could be given. Every large city in the UK will have major building work going on somewhere, so why isn't the problem occurring outside of London? First thing that springs to my mind is that for over a year the eyes have been on London due to the Olympics & the build-up to them, so its reported more.
The lorry involved in this latest incident was carrying a skip that someone said was batterred, it was also capable of use by two differrent types of lorry. Skip lorry as shown or the type that uses an arm to load/unload it. The lorry itself, subject to wear & tear through use is subject to an MOT, the skip isn't, the lorry itself is less than 18 months old.