"Early concept work has begun on the UK's next generation of ballistic missile submarines. However, critics of the government's plan to renew the Trident strategic weapon system contend that the deterrent debate is by no means over. In an office suite at BAE Systems' Barrow-in Furness shipyard in northwest England, the first steps are being taken towards the design and build of a new generation of ballistic missile submarines. The aim of the concept is to ensure that the UK can continue to deploy a submerged strategic nuclear deterrent capability for at least another 50 years."