They're looking at the wrong end of the problem - you can implement all the tech you like, but ultimately you'll run into the Slough of Despond of the so-called British Justice System.

[Alleged] perps will wait months to get to trial only to be either acquitted on a technicality, or be handed a derisory "slapped wrist" fine/sentence. If the former they'll be able to pay in instalments. If the latter, it'll most likely it'll be suspended or reduced to Community Service.