The exemplary chaps at MySociety.org, a group of mostly volunteer developers producing e-democracy-related web apps has managed to get the prime minister to support (or at least host) an online petition system (see BBC news coverage). Among the petitions launched so far is one which asks him not to replace the Trident nuclear weapons system. I encourage you to sign it – though note that these petitions are for UK residents only.
I oppose the replacement of Trident both on economic grounds and in the interests of encouraging others to abandon their own nuclear arsenals. Nation states who would use nukes against us would surely be deterred by the US and the international consequences of their use, while terrorists are not deterred by nuclear weapons and couldn’t in any case be targetted by them.
It seems to me that this decision comes at a crucial point in history where by deciding to turn away from nuclear weapons we could help turn the rest of the world in a new direction (and save billions that could be used to tackle important issues like climate change).
If you have some more time after signing that petition, please also sign this petition asking for a free vote and a full debate in parliament or visit The Big Trident Debate which has its own similar petition and discussion spaces.