julian lewis. >> thank you, mr. speaker. we have made clear that we are committed to maintaining a new deterrent. that's why it was excluded from the security review and why we commissioned a separate value for money study. the replacement of trident is going ahead and the initial gate will be passed soon. as set out in the coalition government the liberal democrats will continue to make the case for alternatives. >> dr. julian lewis. >> when the coalition was being formed my right honorable friend promised a meeting of all conservative mp's that the liberal democrats would support the replacement of trident. as we know the key decision has been postponed until after the next election and the liberal democrats from their president downwards have been boasting that this is their achievement. will the prime minister give a pledge to this house and to the country that in the event of another home parliament, if the liberal democrat demanded the price for another coalition that's scrapping it up, he will refuse to pay that price