The British legal system may be civilized, but how does this work if you're Joss Stone?
These men were equipped and ready to murder her and steal from her. They had the means and the intent to find her, kill her, and take what they could and flee. This was premeditated and planned out. The only thing that has saved them is, ironically, their much-remarked haplessness.
I think letting them out of prison in a few years is a huge, huge mistake for the rule of law in any country.