I'm back inside. After four years in HMP Holme House, followed by shorter spells in Durham, Low Newton and Frankland prisons, I have just started a nine-month stretch at HMP Moorland, outside Doncaster. Fortunately this is one writing-residency where I will not be resident. But British prisons are full of writers. Writing is important in prison. If you can express yourself on paper, you are likely to be in demand helping others write apps, statements, instructions to solicitors and letters home. Poetry has a special role in prison life. Men who would not often go near a library in their ordinary lives, in prison can find solace and encouragement in reading and writing poetry. Prison magazines always carry pages of poetry. The Koestler Awards are an important part of the prison calendar. No-one is embarrassed to say that they like poetry in prison. Among the 'window warriors' who stand at the windows at night shouting to themselves and to others, there are always some who rap for hours in long improvised monologues. There are certain poems-usually about love, heroin and regret-that prisoners take with them from one prison to another, copying them out and learning them by heart until the poems 'belong' to them. The poet Ken Smith once met a man in Wormwood Scrubs who genuinely believed that he had written Gerard Manley Hopkins' poem 'The Wind Hover'. This is what happens when poetry is taken seriously. In such an emotionally-strained environment, poetry can be a form of release, a means of clarification and self-justification and a kind of public confessional. It is even a form of currency (especially around Valentine's Day and Mother's Day). Poems are copied, passed around and sent out in letters to wives and girlfriends: