moD used his binoculars and saw the crack which you could see the Weed and it’s not 1.1 for the video name because it’s trueSo a crack 1 pixel wide with no light on it? Technicalities don't work with admins. Also, nice 1.1 in the video name. Edit: you can't even see it on the video, the crack doesn't even show any green.
No they cannot just walk in. And if they knock on your door you are not obliged to let them in without a warrant.
Although the police do have certain powers to force entry if they believe a crime is being committed, the smell of cannabis (unless it is so over powering it could be a hemp farm inside) is unlikely to qualify as reasonable cause for doing so.
Another good reason to never allow the police into your home. We have written an article about this subject here: