IT'S Monday at 7am and the police are hammering on a front door trying to catch up with one of their targets. His crime was petty - avoidance of a train fare - and took place nearly two years ago. But his is one of almost three dozen people from Hartford and Oxmoor whom officers were aiming to wake. Between them they owe almost £10,000 in unpaid fines for a collection of crimes ranging from assault and drink-driving to not wearing a seat belt. And they were not the only people in for a surprise this week. Motorists without any tax or insurance, and those driving vehicles unfit for the road, were also targets. Some faced having their vehicles clamped or towed away. The raids, the police say, were orchestrated as a reaction to residents in Hartford and Oxmoor keen to see officers clamp down on petty crimes. Working with court warrant officials from Drakes, police officers were visiting the homes of 34 people who had outstanding fines.