At least £100 billion. Building new submarines will cost over £25bn. Then the running costs will be around £60bn over the new system’s lifetime and eventual decommissioning is estimated to be about £13bn. The warheads will probably need to be replaced. Additional costs include extending the life of this missiles and security costs. This money would be better spent on employing more nurses and teachers, developing clean energy, scrapping tuition fees or building affordable homes.
How much does replacing Trident cost?