Cycle campaigning

Dunno what the latest count is, they covered Bank junction a while ago

The City says that approximately 18,000 pedestrians an hour traverse some part of the junction during the morning peak, along with 4,500 people aboard 220 buses, 1,600 people in 1,430 motor vehicles, and 1,600 cyclists - up from just 700 in 2010.

http://www.theguardian.com/uk-news/davehillblog/2015/nov/20/london-bank-junction-to-be-transformed-for-cyclists-buses-and-pedestrians

Cyclists will outnumber car drivers entering central London in rush hour in the next few years, according to figures from Transport for London (TfL).
The number of car drivers fell from 137,000 in 2000 to 64,000 in 2014, while those of cyclists trebled from 12,000 to 36,000 over the same period.
TfL says the shift away from private cars to public transport and walking and cycling is "a feat unprecedented in any major city".

http://www.bbc.co.uk/news/uk-england-london-35475318

Risk is probably best worked out per mile traveled rather than with absolute numbers. In other words the number of collisions may have risen, the rate has declined so each rider is less at risk.