Given that there are only 234 prison spaces left in the whole country, John Denham's approach is certainly an option.
It's not the only option though surely. An alternative is to build a few more prisons. This Government (and Denham was a former Home Office minister) has overseen a massive breakdown in law and order.
Instead of spending vast sums of money on useless ID cards, why not built a few more prisons and lock up a few more criminals? This Government needs to get a handle on the mess it has created. Some of sentences being handed down to violent criminals are absolutely distgusting.