Sir David Attenborough, the wildlife documentary maker and incredibly lovable man, is a national institution. Perhaps surprisingly, he is also the first knight of the realm I have ever written to. I feel less inclined to explain why I consider Sir David a hero than I have for previous letters, as if you have seen any of his documentary series (particularly Planet Earth and Life) you will be well aware of why I love him so; and if you have not, well then you should immediately purchase both of the above series', lock your self in a room, and stay there until you have watched both in their entirety.
