I got caught with a joint

So me and a few friends got caught with a joint. They handcuffed us and took us to the station. We all got a warning and my mate who had the joint had to give a statement and apparently has a court case coming. Now they will ring us and maybe even call us into the station again. Does anyone know what will happen from here? Will they take a piss test or something like that or should we be good? via /r/uktrees https://ift.tt/35AVLEj