As I read it, the release is a follow on from the work Chris Boardman has been doing, representing BC. This is, I think, a good thing. BC are now very recognised, compared with other organisations For example, few people outside the sport have heard of CTC - now Cycling UK? What an uninspired rebrand in an effort to get more members. Likewise other "campaigning" groups. I have heard of LCC and they probably do a good job in the capital, but that has limited national impact.
As BC appear to have the largest membership - over 120,000 - and clearly the ear of government - then they are probably best placed to drive campaigns.
Wouldn't it be good if everyone could get together for maximum impact? Then again, this is Britain and the day it happened someone would get upset because their pet issue was not top of the agenda, and go off to start their own organisation. I've never really been a union type, but in this case, that unity would be strength to everyone's benefit.