Key Facts

• UK Defence Secretary Ben Wallace has resigned from his position in a row over military spending, citing that the funding for a new defence investment plan "falls well short of what is required".
• The resignation is a significant development in the UK's defence planning, as the new defence investment plan is a crucial component of the country's strategic capabilities.
• The exact details of the funding allocated for the defence investment plan have not been disclosed, but it is clear that the Defence Secretary felt it was insufficient to meet the required standards.
• The resignation of Ben Wallace has sparked a leadership crisis within the UK Defence Ministry, with the position of Defence Secretary now vacant.
• The UK government has yet to announce a replacement for Ben Wallace, leaving the country's defence planning in a state of uncertainty.