Steve,
When I corrected your statement, "The Met said he had not been radicalised in prison" by stating, "No. They said they had no evidence for it." You asked "How do you know?"

I was directly quoting Deputy Assistant Commissioner Neil Basu, the senior national co-ordinator for UK counter-terrorism policing who stated, ""There is no evidence that Masood was radicalised in prison in 2003, as has been suggested."