That he was a nice guest. And then the nice guest got into his car and drove to westminster bridge. John sweeney reporting there. Well, as you heard, Khalid Masood spent time in three different prisons in his earlier. There has been a well documented problem of islamist radicalisation within the prison system. Last year, ian acheson wrote a report for the government on the issue and joins us now. Thank you forjoining me this evening. There is a lot we dont know about Khalid Masood. Yes. But it is very clear but we do know that he spent time in lewes prison, where you spent a short time as a governor there. And a couple of other prisons, weiland and ford, which you visited. Can you give me an idea that when you visited them, how aware you would have been of the problem of radicalisation there . Firstly, its important to emphasise that we have no idea at this point in time whether his periods of time in custody were relevant at all to what he became, which was a murderous terrorist. Or,