Lord George Robertson, the former Nato chief, will deliver a speech in London today, warning that the UK's national security is in peril due to cuts in defence spending.

The former secretary-general of Nato will use the platform to launch a scathing attack on the Treasury, accusing non-military experts of vandalism in their handling of the defence budget. Robertson's comments are significant, as they come from a respected figure in the field of international security and defence. The warning about the state of the UK's national security is likely to resonate with many in the defence community, who have long argued that the country's military capabilities are being eroded by successive cuts in funding. The accusation of vandalism levelled at the Treasury suggests that Robertson believes the cuts are not only misguided but also reckless and damaging to the country's long-term security interests.

The UK's defence spending has been a topic of controversy in recent years, with many arguing that the country is not meeting its Nato commitment to spend 2% of its GDP on defence. The cuts in defence spending have resulted in a reduction in the size of the armed forces, as well as a decrease in the procurement of new equipment and technology. This has raised concerns about the UK's ability to respond to emerging threats, such as terrorism and cyber attacks. The situation is further complicated by the fact that the UK is facing an increasingly complex and unpredictable security landscape, with threats emanating from multiple sources, including Russia, China, and extremist groups.

The warning from Lord Robertson is part of a wider pattern of concern about the state of the UK's national security. In recent years, there have been numerous reports and studies highlighting the need for increased investment in defence, as well as a more strategic approach to security policy. The fact that a respected figure like Robertson is speaking out on this issue is likely to add weight to the argument that the UK needs to rethink its approach to defence spending. The government will likely face pressure to respond to Robertson's comments, and to provide reassurance that the UK's national security is being taken seriously.

The implications of Robertson's warning are likely to be far-reaching, with potential consequences for the UK's relationships with its allies, as well as its ability to respond to emerging threats. The government will need to consider the concerns raised by Robertson, and to develop a more comprehensive and sustainable approach to defence spending. This may involve increasing funding for the military, as well as investing in new technologies and capabilities. The reaction from the Treasury and the Ministry of Defence will be closely watched, as they seek to respond to the criticisms levelled by Robertson and to reassure the public that the UK's national security is being taken seriously.