my mate from neath in wales got caught with 6 plants, all rather large, and he got a caution and nothing else. another mate got caught in bridgend and had three months inside. he did have over 40 well established large plants and made the front page of the daily mirror. he got burgled and phoned the police himself, who appeared, got a wiff of his grow, and promptly arrested him. The mirror headline was "dopey boss grasses himself" as he was growing them in his business factory unit. i think the trick is to only grow what you need for personnal use. 6 plants is cool, 40 odd and i think they tend to feel your taking the piss with the personnal use argument.