My Lords, there appears to be a difference between the Litvinenko case and this case in that, in the former case, a substance was used that left a very clear track and it was very easy to follow through on it. In the current case, however, it appears from what has been said that the nerve agent that was used does not appear to have left a trail, or if it has done, there has been no comment about it so far. It might be that lessons were learned by the perpetrator in the current case from the Litvinenko case. I hope that we will also learn—or have learned—the lessons from our handling of the Litvinenko case, where the initial response, lasting for quite some time, was quite inadequate. Commentators have said that it very clearly left the perpetrators with the feeling that we were a soft touch. Therefore, we will have to be even more robust in our response this time than might have been the case if we had not had that not-so-good example before us.