Just as it would be perverse for the Kremlin to investigate MH17 or the Salisbury incident, it would be utterly perverse for the House of Saud to have its fingerprints anywhere near this investigation. Although I would like to see the Foreign Secretary introduce an arms embargo, I welcome his announcement about the Trade Secretary not attending the upcoming summit in Saudi Arabia. Will he confirm that it will not just be Ministers who will not be going but that there will not be one official from any Department in London or from any of our embassies around the world?