not knowing the location, it sounds exactly like "shock horror, police apply law correctly, cyclists don't like it".....
Read the other thread. When this bus lane was under construction, I (and a lot of other cyclists including the local LCC people) was very much looking forward to being able to bypass a four-lane gyratory which includes a set of traffic lights on a bend (great place to get crushed). Now the contraflow exists but due to the actions of non-cyclists is not available to us after all, we feel let down. Arguing about whether the Highway Code is the Law or not is a fun activity for Internet users of all ages, but completely a side-issue as far as this is concerned.