What immediate 3.5 percent defence spending would change

How different would the Defence Investment Plan be if Britain moved immediately to 3.5 percent of GDP for defence?

On the figures used in the discussion, the increase would eliminate the annual funding gap and leave some room to expand programs rather than defer them.

The calculation starts from a defence budget of roughly 74 billion pounds a year and an estimated annual shortfall of about 20 billion. The additional 15 billion discussed in the plan works out at roughly 3.75 billion a year over four years. Moving immediately toward 100 billion a year would cover the estimated gap. On those figures, some money would remain for expansion.