As has been widely reported (try here and here), a Dutch court recently ruled that an alleged narcotics smuggler could not be extradited from the Netherlands to Great Britain, because of atrocious conditions at the prison in Liverpool, England. A copy of the decision can be found here; it is in Dutch but contains extensive quotations (in English) from a UK government report that scrutinized a number of British prisons.
As this excellent article by UK extradition lawyer Ben Keith explains, this is an increasingly serious problem for the UK, and for a number of European states. It is worth pausing to think about this -- an EU member state will not extradite someone to the United Kingdom, also (for the moment) an EU member state, one of the permanent five members of the UN Security Council, supposedly one of the richest and most civilized countries in the world. Because the conditions in its prisons are "inhuman."
It is also worth noting that Canada has extradition relations with the UK, Romania, and other states referred to in Mr. Keith's article. As we note in Chapter 9 of the book, Canadian courts (led by the SCC) have mostly resolutely refused to deal with the issue of foreign prison conditions and whether it is at all humane to extradite people to face imprisonment (and sometimes lengthy and excessive pre-trial detention). I would suggest it is time for a re-consideration.