Chris Philp A BBC presenter roasted a senior Tory over his demands for tougher knife laws in the wake of Saturday’s mass train stabbing attack.A train worker is “critical but stable” following the horrific incident on board an east coast main line train between Doncaster and London.A 32 year-old man, described as black and British, is being held on suspicion of attempted murder.Shadow home secretary Chris Philp has called for greater use of “stop and search” to get more weapons off the streets.But Anna Foster, a presenter on Radio 4′s Today programme, pointed out that he was the police minister up until last year and could have toughened up the law if he wanted to.Philp said: “We know that stop and search, where it’s used, in London alone used to take hundreds of knives every single month off the street.“I’ve spoken to the families of the victims of knife crime, who say they wish my son or daughters’ killer or attacker had been searched on the way to that incident. “We know it takes knives off the streets