Criminal damage

• How long do I have to report an incident to the police?
• I have just seen a bench/road sign/fence, which looks like it has been vandalised. Who should I report this to?
• Is there a legal requirement to report a crime?
• My car has been broken into what should I do?
• My landlord has changed the locks and I can't get in, can I break in?
• Someone has thrown a brick through my window, what do I do?
• Someone has vandalised a local bus shelter. Who should I contact to get it fixed?
• There is some graffiti/fly posters all over a wall on my street. Who should I contact to get it removed?
• What is the law with regards to graffiti?