There's always the issue with nailing the wrong person. Also, it's soooo 1800's. I think we should be above this sort of thing in 2005.
Instead, prison should be made far, far tougher. Chain gangs breaking rocks, less interaction with other prisoners (many crims go into jail as fairly minor criminals then meet loads of contacts and learn much in jail. They come out far harder, more dangerous and more knowledgeable. Prison does all the wrong things) forced education, etc etc.
Unfortunately the stupid US human right BS has come over to the UK and now you simply can't do anything to anyone without getting screwed over in the courts.
IIRC, one inmate managed to successfully sue for not being given access to porn.
Utter BS.
I say hard labor, eight hours a day, five days a week. Then education for the remaining two days. It should be staggered such that no two inmates see each other more than once every week, less if possible. Prison should be a nightmare, not some health club (as one inmate describes it) so that people would really think twice about doing that crime.
Capital punishment: too dated, not tough enough, lowering to the levels of the criminal. Not cool.