So in comparing boroughs, need to take account of a lot of factors that affect cycling, not just Local Authority transport policy. Hackney is right to celebrate its high levels of cycling. But in a borough like Westminster where there are lots of local jobs, you are not going to get the same levels of cycle commuting whatever the transport policy.
For the record the figures for Southwark are 7.7% cycling to work, 13% walking, making us 7th out of 33 for active travel to work.
For more on who cycles where in London see my article in London Cyclist, Feb/Mar 2013