Reprieve is a group of lawyers who fight for the human rights of prisoners all over the world. At present they have installed at the side of St Martins-in-the-Fields church, Trafalgar Square, a full-scale replica of the death-row cell in Texas of the only British woman under a death sentence in the US, Linda Carty. Sentenced back in 2002 after what is described as a flawed trial, Carty is due to be executed by fatal injection in the next few weeks. I sat on the bunk in the cell writing her a letter of support as a video of her singing Amazing Grace played. A most beautiful voice, deeply moving. Whether guilty or innocent, the babarity of any execution by the state, and in a developed world particularly, is abhorrent, inconceivable.