The duty to consider these principles should be applied in the early stages of policy development and considered throughout. In doing so, the extent to which a policy will contribute to climate change should be considered alongside other impacts of the policy on the environment. Net zero will therefore be facilitated by the principles where they are applied to relevant decisions. This builds on important announcements in the 2021 Budget, particularly the new UK Infrastructure Bank that will use its £22 billion of financial capacity to crowd-in private investment to support economic growth, accelerate our progress to net zero, and help level up the UK. One of the Bank's objectives is to help the UK transition to net zero emissions by 2050. Ensuring spending decisions contribute to net zero is a major priority for HM Treasury. The Green Book already mandates the consideration of climate and environmental impacts in spending. It has been updated so that policies must be developed and assessed against how well they deliver on the Government's long-term policy aims such as net zero.