Addison Lee drivers told to defy bus lane law (and to just say SMIDSY)

How about "Take primary position when appropriate"?

Otherwise I'd be concerned that we're gifting Mr Griffin with "these loony left cyclists are deliberately blocking tax paying traffic, at a time of recession, blah blah look at my tie"

And taking primary position is not blocking traffic. It is becoming part of the moving traffic. If anything it will slow bike riders more unless we filter (to the right of the queue)