Russian assassination manual

As has now become apparent for some time, the British case against Russia in the Skripal case is based entirely on intelligence of a sort that will never be produced in a court of law.
The conclusions of that intelligence – though not it should be stressed the intelligence itself – has now been revealed in a letter sent by Sir Mark Sidwell (Theresa May’s national security adviser) to NATO secretary-general Jens Stoltenberg.
Since this letter sets out the entirety of the British case against Russia in the Skripal case, I will reproduce it in full

The events of the last few days in the Skripal case provide an object lesson of why in criminal investigations the rules of due process should always be adhered to.  The reason the British now find themselves in difficulties is because they have not adhered to them.
This despite the fact that – as they all too often like to remind us – it was the British themselves who largely created them.