So, Dr Julian Lewis MP, if we cannot know what the threat will be in 2050, then how can we know that Trident will be of the slightest use against that threat? After all, it is of absolutely no use against anything now.
In fact, "our" nuclear weapons have never succeded in deterring anyone whose dispute was specifically with Britain: Nasser, Galtieri, the IRA, anyone. But then, they are nothing to do with any specifically British interest. Our only connection to them is that we not only host them, but have so little self-respect as to pay for that dubious privilege.