The addicts are believed to be quitting due to a heroin shortage

Operation Round Up saw more than 100 drug dealers removed from the streets and hundreds of thousands of pounds worth of heroin seized.

The Sunrise drugs project said it had been approached by 117 users in six months - three times more than usual.

It believes this is due to less heroin being available.

Project workers said this resulted in more people choosing to give up drugs.

However, they also believed a joint effort from the authorities had helped.