What really shocked me about the clip was that it looks as though the construction sites were allowed to encroach on the temporary road width, making it incredibly dangerous. In Kensington, a large construction site just south of Kensington Gardens has a giant steel framework over four lanes of traffic so that the site cabins are out of the way.
Cyclists are more at risk through road works and TFL have specific guidance on this (my bolds):
"Where cyclists are on-carriageway and the speed limit is 30mph or 20mph, it is usually desirable to keep them on carriageway through the roadworks. In this case, a wide lane (minimum width of 4m) enables drivers of all motor vehicles to overtake cyclists with an acceptable clearance.
If a 4m lane width cannot be achieved then, according to advice given in TAL 15/99 Cyclists at Roadworks (1999), a ‘narrow’ lane width of up to 3.25m to 3.50m will enable car drivers to overtake comfortably and will generally deter drivers of larger vehicles from trying to pass at all.
If 3.25m cannot be provided, then a ‘narrow’ lane width of up to 3.25m and a speed limit of 20mph should be considered with signs stating ‘narrow lane(s): do not overtake cyclists’.
Lane widths between 3.50m and 4m should normally be avoided as drivers of large vehicles may attempt to overtake cyclists without adequate clearance."
The lane widths in the clip are not easy to estimate - but look around the 3.5m (using the 2.5m wide bus as a guide)...Hopefully, the investigation into this tragedy will examine the lane widths and best practice guidance.