What is the best way to deal with a neighbours cannabis farm?

Reporting to the energy companies is also an option, especially if you believe they are abstracting the electric, as they have an easier threshold for getting a warrant than the Police do. But I can offer my expertise to your Police question a bit. Firstly, its always fustrating when people question whether to report to the Police and in the next breath complain the Police dont do anything. How do they know? Its also then about the quality and quantity of information you are providing. If you say "Ive told the Police and theyve done nothing". Well.. when? If you complained once a year ago, then of course nothing will be done. Theres zero chance a warrant will be accepted based on one old report. It needs the community to regular report problems for the Police to take interest. That may not be what people want, but its the reality of the country and funding/cuts to services that they cant do everything all the time, and are not psychic enough to know everyones problems everywhere without being told. "Even if my name is left off the paperwork" - Reports like this would be classed as Intelligence, where the information is restricted, as opposed to you being a Victim of a crime where you would be interviewed etc. When you details are added to Police systems as a source, it is automatically restricted and only a select few staff can see that information. If you ring 101 for example, that call handler will input your name etc then once submitted, they wont be able to see it again. They could technically remember it, but with the amount of calls they take its unrealistic. Any local Police Officers or often even those executing a warrant would not know it was you would told the Police as even they cant see your details. However, providing your details is important as it results in a better grading of the information and its reliability. If you ring up and say my name is X and i live at Y and this is my information, it is graded higher than somebody reporting completely anonymously through crimestoppers. So when going to a judge for a warrant they can assess how reliable it is by members of the public - even the judges wont know your name. "Ill be the prime suspect as the informant" - not necessarily, as you would hope lots of your neighbours would also report problems in their community. But lets just say its you. The first role for the Intelligence staff dealing with your report is to protect the source and sanitise the information. If you say I live at No. 6 and my neighbour at No. 8 is growing cannabis and I can smell it every night - thats not how it would be in the final report. it would be along the lines of "there is a strong smell of cannabis coming from No.8 where the occupants are cultivating". How would they know thats you, and not someone walking past regularly to walk the dog? If officers do investigate it there would be more reliable reports from them should as "On X date at Y time, Officers attended No 8 and could see signs of cultivation such as XYZ" but Police Officers dont need to be protected in the same way as sources. Similarly, if you can hear fans etc because youre a attached property, I would look on google and see the layout of the property. If you are semi-detached, so its likely its only you who can hear the fans, I simply wouldnt include it in the Report. If its the middle terrace, maybe, as theres potentially a couple of neighbours then who could of reported it. TLDR: Cops cant investigation what they dont know. Differnt people need to be regularly reporting reliable information. Your details are restricted.