It's a class B drug in the UK so it's illegal to possess or supply it .
A first offence would be let off with a warning and the next offence might be punished with up to three months in prison or a fine of up to £2,500 .
This increases with further offences .
However , cannabis is so widely smoked that I wonder if the Police would investigate and prosecute .
If your neighbours are involved with crime then , the Police would certainly be interested in investigating them .
But you have to live next door to them in a small cul-de-sac : it wouldn't take much imagination to pinpoint you as the whistle - blower .
Not being spoken to is one thing and being the object of gossip is
another and there's a risk of enduring a campaign against you .
I haven't experienced those things , but I know people , who have .
Be pleasant and friendly , have a glass of wine with them and ignore it !