Steve Taylor is a London campaigner for prison reform, and he has a large number of photos of prisons on his site, showing the architecture.

These photos were taken to illustrate two books: one is English Prisons: an Architectural History (£40, ISBN: 1873592531), and the other is Behind Bars : The Hidden Architecture of England’s Prisons (£10, ISBN: 1873592396)

I’ve given the ISBNs because particularly the second one was hard to trace – the title Behind Bars has been used inter alia for books on mixing drinks, barcodes, running a pub, and zoos.