Convicts have to pay the government's legal expenses? (At end of article) ... Wild but I suppose there's a certain logic to it.
It's definitely been used in complex fraud cases where the convicted person is a high earner.
At the low end in criminal cases heard in magistrates' costs, the convicted will pay a criminal court fee, which is fixed and not big, they can be asked to pay towards the prosecutor's costs, and there can be a victim surcharge (which funds victim support services and is not compensation for the victim), but those are means-tested.