[ti:] [ar:] [al:] [00:00.00]The British Prime Minister Gordon Brown [00:03.89]is offering to scale back Britain's nuclear deterrence [00:06.81]if an international agreement is reached [00:09.30]to cut the world's nuclear arsenals. [00:11.35]Mr. Brown is expected to tell a special [00:13.72]session of the United Nations Security Council on Thursday [00:17.14]that he'll be willing to give up one of four royal navy submarines [00:21.24]that carry Trident nuclear missiles. [00:23.23]Officials are insisting that cost isn't a factor here. [00:26.47]Here's our defence correspondent Nick Childs. [00:28.58]Gordon Brown is saying he'll be ready to [00:31.51]throw part of the trident force into the port [00:33.37]in the context of a much bigger global disarmament deal. [00:35.92]He said so in general terms before. [00:38.60]This offer though is more concrete. [00:40.59]There is a growing sense that to avoid what some fear [00:44.07]could be a sudden cascade of new nuclear states, [00:46.50]the established nuclear powers need to do more [00:48.99]in terms of disarmament [00:50.35]to keep the proliferation regime intact. [00:52.34]The Prime Minister will hope his move [00:54.40]will be seen as an important gesture. [00:56.08]But the key to the process will be the actions of the big players, [00:59.44]the United States and Russia.