The hockey stick - had it been true - was a visual representation for publicity impact, intended to make it "obvious" to "everyone" that it was "really happening now". But it doesn;t really matter how warm the mediaeval warm period was, or how cold the little ice age was, these are relatively slow climate changes over longer periods which can be laid to natural effects. AGW has been acknowledged mainstream science for a long time: it has been generally known and understood and in the mainstream since the 1930s, having been first predicted in the 19th century. It is true even without the hockeystick. But even without the hockey stick, we have still warmed quite a bit since the 1970s. It is still true that what has warmed us up a lot since 1970 is CO2. And if you don't believe human-operated thermometers, you can believe nature's thermometers, such as when spring flowers open, and the moving range of plants and animals, the accelerated melting of glaciers, etc, which are a worldwide phenomenon, not just in the UK.

If you don't believe in AGW, perhaps you'd also like to deny Newton's Laws of Motion. Because the science of how CO2 insulates our atmosphere really is as solid as Newton's Laws. There's a very popular book that does just that, by a guy called Mark McCutcheon. Since it doesn't actually explain that is what it does (it pretends instead that it is fixing something wrong with the law fo gravity) the scientically illiterate give it rave reviews on Amazon. Or you could go to David Icke's website, and learn that cancer is a fungus.