Could modernization and Trident fit the defence budget?

Were the announced naval improvements affordable within the existing defence budget, and would choosing Trident require a lower standard of living?

Speed said the improvements were already costed within the budget, but he answered the Trident tradeoff with a political case for security rather than a quantified cost.

An MP argues that defence expenditure was already out of line with expected economic growth and asks whether the listed improvements fit the existing budget. Keith Speed answers that the improvements had been costed and would stay within it. On the separate claim that choosing Trident would force a lower standard of living, he offers a political defence of freedom and security rather than a quantified fiscal answer. The exchange distinguishes a specific affordability assurance for the modernization package from the unresolved wider opportunity-cost argument over nuclear deterrence.