Cannabis is now a class B drug. This means, uh, well, not much it turns out. If you’re over 18 you’re that much more likely to get properly cautioned or fined, and if you’re caught dealing it you can get longer in jail. That’s not that much different in the grand scheme of things. Also, if you’re under 18, the law seems to make no difference. Police may now make a higher priority of it, possibly, depending on your area, but they probably won’t.