that's streatham now, where sudesh amman stabbed two people in the high street. he was going on to stab more, but he was shot dead by an armed surveillance team who were actually keeping him under 24 hour surveillance, because he'd been just released. and they did have intelligence and concerns that he might go on to reoffend. but even they, you know, with that proper 24 hour round the clock surveillance couldn't stop him just nipping into a store, stealing a knife, running out onto the street and stabbing people . that's how stabbing people. that's how difficult it is to keep proper track of individuals who are determined enough to put their own life at risk to go and harm others. >> and mark, you said earlier on in the programme that this may become an increasing problem because the al—qaeda terrorists and the isis era terrorists who were imprisoned at the time are now coming up for release, and this will increasingly be of concern . but has sentencing of concern. but has sentencing of terrorists changed? because if people are locked up with indeterminate sente