:: "In a dangerous and uncertain world, unilateral nuclear disarmament has never been and will never be the right answer." - Tory leader David Cameron on Trident.
:: "There is no use putting a beautiful engine on the road and saying 'here is devolution, here is a wonderful form of Government' if there is not the money to pay for the fuel, the fuel to run that engine." - DUP leader the Rev Ian Paisley.
:: "I can't help remembering the last time the Tory Leader and you voted together in the same lobby on an issue of national interest was over Iraq and it hasn't proved a very comforting precedent." - Sir Menzies Campbell, Lib Dem leader, to the Prime Minister on Trident.
:: "It is perhaps a paradox that those who oppose this decision are often among the fiercest critics of the United States but would leave us in a situation where in the ultimate crisis our security would be wholly dependent on the credibility and resolve of the White House - or of the Elysee - and their readiness to risk everything for the sake of Britain." - Shadow foreign secretary William Hague on the risks of having no nuclear deterrent.
:: "Do my Hon friends really believe that if we give up Trident the eight other nuclear weapons powers will say 'Good old Britain. They've done the right thing. We must follow suit?' Madam Deputy Speaker, pull the other one." - Former shadow foreign secretary Sir Gerald Kaufman.
:: "I think this is an argument about virility, about vanity, I think this is about aspiring still to that bit of superpower status" - SNP leader Alex Salmond.