daniel sanford, bbc news, london bridge.attack this morning, and pledged to toughen up sentences. the labour leaderjeremy corbyn called for a full investigation into khan's early release from prison. our political correspondent jessica parker reports. hello, how are you doing? visiting the scene at london bridge, the prime minister, alongside the met police chief, cressida dick, as people try to take in what has happened and understand what lessons can be learned. boris johnson today said that the case of usman khan raised the issue of sentencing. i have said for a long time now that i think that the practice of automatic early release, where you cut a sentence in half and let really serious violent offenders out early simply isn't working and i think you have had some very good evidence of how that isn't working, i am afraid, with this case. general election campaigning has overall been more muted today, but the labour leader said there needs to be a full investigation into what has happened. clearly, there has been a compl