'Advice' from City Police

Of these:

Between April 2012 and March 2013 145 cyclists were injured in the City, 21 seriously.

A) I wonder how many were cased by

Ignoring these signals

B) and how many were caused by

1) Black cabs swerving to the kerb to pick up/drop off passengers
2) Pedestrians stepping out into the road without looking (and most of us do it on occasion)
3) Passengers hopping off or on Routemaster buses without looking
4) Vehicles turning left across you - even more serious if it is a bus or truck
5) Car doors being opened into your path
6) Vehicle creepage at junctions
7) Delivery vehicles parked in cycle lanes
8) Drivers failing to indicate properly leaving everyone guessing
9) Vehicles doing impromptu U-turns.

C) And how many might have been mitigated by cyclists doing one of the following

1)Protect yourself - always wear a helmet
2)Be seen – wear reflective clothing
3)Be heard – have a bell fitted to your handlebars
4)Be alert – stay aware of what is going on around you and what other road users are doing
5)Get noticed – use hand signals and eye contact to communicate your intentions

My guess is:
A) A single digit percentage
B) Lots
C) Far fewer that the advocates of these magic safety techniques would have us believe.