nas 2007, what are you talking about????? If they knock and you don't answer they will force entry, you don't get that early morning call without a warrant, I can tell you that from experience! They will always knock/give warning first, they have to by law, but you need to open up quick. I think you've been watching too much TV. Better to comply with them and co operate, why make things worse? the word of a suspicious/vindictive neighbour can be sufficient to produce a warrant, that's all the evidence they need. Its not a pleasant experience to go through, but it can save a lot of hassle if you just accept what's happening and co operate, especially when you have family. That's my opinion anyway. All very civilised in my case, wife offered them tea as they searched the house and bagged up the plants etc, no threats at all from them, they just took my 32 plants and I later received a police caution. My warrant was for 'supply' but they accepted 'personal' as it was, and no hassle. Why make things worse??
Hope to talk to you later tamjam, you have my number.