Saw this report on Twitter from a witness, but no further details.
Westbound falls will be when a rider moves over into the outside lane approaching Waverley Bridge. My hunch is that such falls will be of the most common type 70% of falls reported in Chris Oliver's study, and very likely with the presence/actions of other road users a key causal factor. The melee if double parking drop-offs for the hotel, Waverley Steps, and Market, plus bus stops AND the regular failed pavement on the carriageway as manhole frames sink and break out from the tarmac provide a high hazard score here.
The poor transverse profile of the embedded rail and abutting track slab concrete, creating additional deep ridges and cracks, with the poured elastomer joints often sunken, pulled out by buses, and then overfilled when repairs take place, should also be recorded after any crash.
Bus CCTV in which the victim appears can be requested by the victim up to 30 days after the event under GDPR legislation. I believe that the bus CCTV from the Lothian bus immediately behind the Rabbies mini-bus was a key element in reviewing Zhu Min Soh's fatal crash. Act fast though bus CCTV is not always reliably held by the current on bus systems.