From Eric Allison, The Guardian I sometimes think I know all there is to know about prisons. The delusion comes from spending some 16 years, on and off, behind bars, during a criminal career that spanned over four decades. Since turning my back on crime, The Guardian newspaper has seen fit to employ me as their prisons correspondent, a post I have held for the last nine years so, although I last left prison some 12 years ago, prison has never really...