Back in 2014, anti-social behaviour in Greenford linked to street drinking was so bad there were even some reports of people defecating in parks.
Problem areas included Greenford Broadway, Greenford Green and North Greenford, with Perivale Park regarded as the most troublesome.
Figures show that from June to August 2014, the time of year when anti-social behaviour is at its highest, a total of seven people had made complaints more than 10 times in the area.
But the number of people complaining more than 10 times dropped to four the following year, during the same time period, and to just one in 2016.
And, over the course of the three years, there has been a reduction of 82% in repeat callers between 2014 and 2016.
It came after police wards in Greenford launched Operation Bottle Top, a clampdown initiative on street drinking following complaints in the area, in 2015.
Instead of addressing the problems individually, each ward teamed up to patrol the streets from 2pm to 11pm on Thursdays, and 4pm to 2am on Fridays and Saturdays.
getwestlondon goes out on the beat
The Greenford cluster includes the wards Greenford Broadway, Greenford Green, North Greenford, Perivale, Northolt Mandeville and Northolt West End.
Problems officers encounter most frequently includes littering, cooking food and drinking high-strength lager in public, which could sometimes lead to violent behaviour. Many of the culprits are eastern European men.
"If they are able to get away with it they will continue to do it," says sergeant Liam Cahill.
"So we needed to change that, and by having a constant patrol strategy where everyone helped we were able to go round from 2pm to 11pm or 4pm to 2am."
The initiative works by encouraging Greenford residents to call them to lodge complaints.
Police also sent out leaflets, spoke to key community members and also reported their progress on Twitter using the hashtag #OpBottleTop.
When coming across a group of street drinkers, officers will ask them to throw away their bottle and, if they refuse, an arrest will follow.
But fortunately, Sgt Cahill says, most people throw away their bottles at the first time of asking, but it is the constant pressure that is driving the behaviour down.
The operation is also about improving relations with residents in the community, with figures showing that public confidence in police in the area is up 5% from last year, according to a survey, Sgt Cahill says.
And by patrolling streets looking for street drinkers, Sgt Cahill says the operation has also led to a number of arrests for other crimes due to the police presence.
Last year, a total of 16 arrests came from Operation Bottle Top, including assault and drug dealing.
"It puts us in the right places to deal with other crimes," Sgt Cahill says.
"There were reports of people defecating and urinating near peoples homes. We needed to work closer, the issue is very complex.
"Success is the sum of small efforts repeated day in and day out."
Operation Bottle Top finished on Sunday (September 18), but officers have urged residents to continue contacting police to highlight the problem.
You can contact Greenford police on 07824 894395 to report any issues.