The spelling depends on whether you see this from a US or UK perspective. A comprehensive analysis of the state of play on this is provided in the latest issue of Disarmamanet Diplomacy, with Nicola Butler and Martin Butcher concluding their long and fascinating piece with the conclusion:
"... it will be important for any new [US] administration to take more account of Allied opinion, giving Europeans a way to avoid a potential new confrontation with Russia and reason not to rush agreement on deploying an unproven system. Canada, for example, has negotiated a way through its similar dilemma by allowing the US to use NORAD facilities for BMD purposes, while refusing to participate themselves - both on cost grounds but also because Ottawa fears an arms race in space.[67] The UK and Czech Republic may come to regret having dashed to support Bush administration policies, while Polish leaders may well look the shrewder for having waited."
The same issue of the journal contains an equally detailed analysis of the future of the Non-Proliferation Treaty. Editor Rebecca Johnson looks beyond non-proliferation towards making the use of nuclear weapons illegal as a starting point for a real turning away from the development and deployment of these dangerous tools of insecurity:
"A more effective deterrent against the use of nuclear weapons is to make it a crime against humanity. Even despots fear being held personally accountable and subjected to public trial and punishment.
Many have already achieved the vision of a world free of nuclear weapons. To move towards accomplishing the reality of that world, we now need to outlaw the use of nuclear weapons for all."
