Welcome to the website of the 'Yellow Box Guru'. UK yellow box law is surprisingly complex, involving the dynamics of the movement, the physical box, enforcement and appeals legislation (which differs in London, England and Wales). Altogether there are at least 10 different pieces of legislation. Most people are familiar with the highway code which states: "You MUST NOT enter the box until your exit road or lane is clear". The contravention code on tickets says something different: "Entering and stopping in a box junction when prohibited".  However neither of these are actually the law. For starters you can see the highway code doesn't even mention the word "stop".  And what does "when prohibited" mean? Photos on the Penalty Charge Notice (PCN) make most people assume they are guilty. However it's not that simple. It's not actually an offence to stop on a box per-say, there are all manner of circumstances that need to be taken into account and all manner of reasons why it's ok to stop. Also boxes and tickets have been deemed to not comply with the law meaning thousands of people needlessly pay up. Most people do not know enough about the law to decide if they are guilty or not and if the case against them is proven.