Ukraine also has “Russian made” BUK missiles, of which there is no dispute that there were plenty in the area.
As to Litvineko:
http://russia-insider.com/en/politics/shame-uk-sham-litvinenko-trial/ri9089
http://russia-insider.com/en/politics/litvinenko-death-blamed-carelessness/ri9743
Yes, that’s right, the UK coroner has never even ruled his death a “homicide,” among other things.