I am sure the hon. Lady will be glad to hear that I am by nature a glass-half-full person, but these are serious issues. We must continue to talk, and we must continue to make the case internationally, along the lines that she has suggested.
All our NATO allies are totally united on this issue. Their consistent message is that Russia has a key role in preserving the treaty, and it must be made aware of that key role, which we agree has been a very important pillar of the European security agreement. I say to the hon. Lady, “Please do not be pessimistic.” This is one of the things about diplomacy. I know that a lot of it goes on under the radar, but we are working together with all our allies, in this particular space but also generally, where there are other breaches of the rules-based international system.