ITN is going to great lengths to rubbish the Luguvoi version of events leading up to the death of Litvinenko. Their reporter was almost sneering as he gave his account of the Luguvoi press conference, making it clear that, in his opinion, Luguvoi had no credibility. In fact the Luguvoi version is as credible as any other.
Question - has Berezovsky the "dissident" (ITN) got friends on the staff at ITN? Big Boris's "friends" can make a lot of money, but they sometimes die in mysterious circumstances. Another explanation might be that MI6 has "assets" at ITN, reporters who are given juicy stories to run with. We know that the all BBC news staff once had to be vetted by the security services. Has that practice stopped? It's hard to tell. But if MI6 controlled BBC news output they would surely want to do the same with ITN by one means or another.
ITN still refer to Luguvoi as an ex-KGB agent, while describing the other ex-KGB agent, Litvinenko, as "Russian exile".