Police spotting (junction watch)

Found it, from May this year:

TfL plans to fine motorists and dock points from licences for ignoring Advanced Stop Lines
London's Cycling Commissioner Andrew Gilligan says mandatory cycle lanes will be enforced too.

In 2010, James Randerson, writing in the Guardian Bike Blog, highlighted just how much uncertainty there was about whether or not it is illegal for motorists to encroach upon ASLs.

The Association of Chief Police Officers (ACPO) was unable to give an answer, and Randerson eventually obtained clarification from the DfT, which confirmed that the offence carried with it a £60 fine and 3 penalty points.

That lack of awareness of the fact it is illegal as well as the relevant sanction may go some way towards explaining why there is apparently so little enforcement.

http://road.cc/content/news/84623-tfl-plans-fine-motorists-and-dock-points-licences-ignoring-advanced-stop-lines